You are very humble and yet, you are and awsome reviewer. Well structured, great content. Still waiting for your chart that you could have on a website linked to your channel like I've seen for other content type.😊 Thx for considering that.
Thank you! That's actually a very good idea! I'll think that through, should be easy, the problem is that Q3 is always hectic in the office and I'll have some free time only just a few days before Christmas. But this definetely goes on my list!
Very nice video... thank you..... if we are not talking about money... just about quality of sound and soundstage overall - which one from those you reviewed up until today, you would prefer or choose most of the times for all day listening? jazz, blues, ambient electronic music.. no heavy metal and similar
@@annebokma4637 thats coming but I need to review all of them, the worst thing would be to do a ranking and then insert something in the middle or at the top later on (id expect crowds with torches and spikes at my door then)
For those, I guess something like FM300A, E405 and - low power! - MF A1, JLH1969 (the one I tested!) or this baby. The others are faster, harder, more 3d maybe, but these will shine in everything mid range. The most relaxed and probably best match would be E405 - most expensive of the bunch!
@@k4syx nobody complains about the hot 100 and that changes all the time 😁 besides your work will never be done. And a running indication of your preference (and specially disliked) can give someone who wants to buy now a valuable resource. Just my 2 cents , keep up the good work 👍
When I opened up my Marantz clone amp to remove the resistors they were absent from the build. Perhaps they read your comments and omotted them recently. I did disconnect the volume pot as you suggested. Thanks for the detailed info on how to do this. It was a very quick tweek. I am enjoying listening to all my favorite trracks with this new setup to pick up ob detail i haven't noticed in the past. So thanks for the recommendation.
This review was indeed a pleasure. Apparently, there is a place for AI. That is in determining the genre and characteristics of a song about to play and amp-switching to the correct one based on rock, choral, dynamics, bass, etc. That can be your next project! Thanks for the recommendation of Sylvia Hotel, Human and Baba Yetu (the Lords Prayer, see also diff version by Aquabella). Great job!
@@EvenHarmonics I was thinking about doing a video on tracks that I use for my tests, as I could explain what to look for in them and why these are IMHO great as benchmarks. And they are great music too:)
Ahh yes, they used resistors on pots between the wiper and ground as a law faking resistor. When used with a high value linear resistor pot say 100-200Kohm and you use say 10-22K resistor it allows better left to right matching and acting as a Logarithmic type. It was a trick used in 70's-80's as a result of poorly L-R matched Logarithmic types.
Here resistors are straight between input and ground. So these are in paralel with entire pot - unless pot is applied differently than usually... So what is the sense for that? No idea!
That was the only explanation I could see. It just doesnt make any other sense and it looks like last stage unexpected addon. But the pot is really cheap and its really, really linear and thus BOOOOORING.
Woe is me. Today my amp decided to fail after three days of listening. Started with speaker noise, moved to terrible distortion, then started have erratic volume. So disappointed as I really liked the sound when it was working. Sending it back tomorrow. So sad! Is this a buyer beware moment with clones?
@davidkellerman1316 I wonder what could happen. Was that for both channels at the same time? Board has two separate channels, maybe it was power supply PCB (if yes). Can you keep me posted with any info you will get from the shop?
I'm enjoying your video's,I primary building Amplifiers,Power Supplies along with DACs while experimenting with SMPS over Linear. Using separate boxes change everything PreAmp, Amps,DACs all have top performance with separation from heat & EMI and common mode noise. Input matching is problematic in Audio.. and example is matching a water hose with running water into another without a spilling
I will do a set of comparison videos once I will finish single reviews :) The goal is to have a table with scores in areas I discuss in my reviews so everyone will be able to pick their poison :)
Is there any value in getting a second set of ‘fins’ for the left side from the manufacturer, as the amp is not too large, or would that not help significantly in the heat dissipation.
@@EvenHarmonics No I dont think so, the other side is quite cool, its far from power transistors. I think rotating the ampand heating to get them to topside may help. Gotta try that over the weekend!
Another very insightful review. Great! :) I have two questions: 1. So the Marantz clone is more refined in sound (detailed) thane Burmesters clone after removing those resistors? 2. Will you also remove a volume potentiometer from JLH 1969 circuit , so making it a true power amp? What can bring this to the sound? I am thinkng to try with mine amp, but I am not an electrician. But there are some specialists for hi-fi...
@@majtextwriter1794 Thank you! Yes I think Marantz clone is more refined, 933 is wilder, so the music genres play a role here too. I wasn't thinking about bypassing volume pot on 1969 as I thought that it may be handy in such a small desktop amp. I'd have to take a look inside of that's something as easy as it was with Musical Fidelity A1 clone
Again, thank you for your effort! Just curious about some of those caps. They don’t look new. Do you know where the manufacturer is scavenging those parts from?
No these look fine actually, but yes, in Musical Fidelity A1 clone and 1969 Hood they definetely used some recycled caps. Which is fine by me, Id rather take recycled EPCOS than brand new Sangxwa (or any other of many very very cheap caps)
Ouch thats a very tough question. Monos are faster, a little more detailed, but this one has better imaging. And monos require better opamps to sound best. But they also use less power and are smaller, and cooler. A good one, I will have to compare them head to head. I am planning to do summaries for amps in the same or similiar price brackets so something like that is coming here.
Price I guess! you can get these in DIY with mono PCBs, but fore ready made device 2 monos = 2x chassis, 2xpower supply so the price goes significantly up. And then going with two monos would also beg for best possible quality parts because if not, then theres no sense in going this way anyway :D
@@k4syx Audioholics: MartinLogan Motion 35XTi Bookshelf Speaker Review Minimum impedance: 5.5 Ohms at 180 Hz. True 88.2 dB/2.83V/1m sensitivity. Easy to drive. 🤔 [ The above graphs show the electrical behavior of the MartinLogan 35XTi speakers. MartinLogan characterizes these as 4-ohm speakers, and I find that to be a very conservative rating. They could easily have specified these to have a 6-ohm nominal load, and I would not have argued. The minima occur at 180 Hz at just a hair under 5 ohms, but that is with a not-terrible phase angle. Most amplifiers, even cheap ones, should be able to drive these speakers just fine. This might be a tough load for a cheap amp to push at a high drive level for a long time, but other than that, it’s not something to worry about (not that anyone is going to use a $1,300 speaker set with an entry-level amplifier). Port tuning looks to be a bit above 60 Hz. I measured the 35XTi speaker’s sensitivity at 88.2 dB for 2.83v at 1 meter which is lower than MartinLogan’s spec of 92 dB for 2.83v at 1 meter. That is a fairly significant difference, but 88.2 is still a bit above average for bookshelf speakers in this class. ]
Much enjoyed, but hope you don't mind my asking a few questions: 1. What class is this amplifier? 2. Do I understand you correctly that this amp uses only a little more power than an old 60W incandescent light bulb did? If so, that's not at all bad - about the same as my class A preamp. 3. Again, and just to be sure, to get the best out of this amp, is essentially the main thing to cut the two resistors you mentioned? Incidentally, they won't deliver to the UK from the shop you link to, but other shops on Aliexpress will.
The old Marantz was an AB, if I remember correctly. With 300w I can't imagine it being any other kind. This clone is based on that and doesn't get hot or use a boatload of power, so AB too
Its AB, though I've found some info that orignal (and maybe this one too) was biased to be in class A for lower output power. Yes its quite efficient when it comes to power requirements (with my listnening levels). Yes cut them and loose them :)
@@k4syx now that class A with lower power would be very interesting. I didn't get what estats you have. It is a bit heavy for the ESL 57 and a bit light for the acoustat x.
@@annebokma4637 he has Martin Logan Ascent Electrostatic speakers he is hoping to drive well on this journey. I have ‘Theos’. Others, please comment if you have electrostats
Thanks! The current one looks like laser engravement, you'd need to sand the whole panel to remove that. Doable. And you can add your thing the same way.
This one reminds me of old Heed/Naim shoe-box amplifiers. I received my FM255 clone preamp yesterday by the way. Dead silent background and it sounds awesome. Looking forward to your review as the design of mine is not exactly the same as yours.
Very cool! 😁 A friend of mine bought a Dart Zeel amp clone from LHY. It's heavy as hell and the parts and casework are top shelf. LHY charges considerably more for their version ($1600/$2100 shipped) but it sounds superb.
Are they trying to lower the input impedance to stop noise or keep it from varying dependent on the volume setting, or if you directly connect it to the power amp board there will still see a load.
@@k4syx Could be some weird hf/r.f oscillations without it. They must have needed it, perhaps for reasons that are not immediately obvious. 47k would be easier to understand.
@@johnshaw359 yes I was going over it again and again and I cant get to anything better than making pot logarithmic. Everything works fine without them and it sounds waaay better too.
It was the strangest thing. Voices started to accentuate at strange times. What put me onto to the problem is I was doing some late night listening at very low volume, amp still wide open, controlled with preamp, and I started to hear noise thru my speakers. At the very low levels it was quite noticeable. I checked all my other equipment. Even went back to my two mono block Aiyma's. The noise was from the MA-9 amp. Then later I lost almost all my volume. Then when it came back sound was quite distorted. Very disappointed as I really loved the sound - just as you had reviewed. I doubt I will hear back as I asked for a refund. Aliexpress allows free refunds and free shipping within first 14 days. Missing this window would set me back expensive shipping. In that regard I feel better purchasing from Amazon when I can. Do you have any other recommendations for an amp of similar character? I saw the DartSel clone was on sale, but the shipping is a killer.
In such cases its better to go for refund as you did just to be on the safe side, though these guys to repair stuff too. Amazon has longer return window so for many things that Im not 100% sure if I will like them I get them here. As for amp, DarZeel clone is king of the hill so far, and in some ways similiar to Marantz clone, but yes both the amp and the shipping are more expensive (its also like more than two times heavier and bigger)
Thank you for a very enlighten video. I was about to order a MA 9 from Aliexpress. But when I saw the specs on their website that mentioned tubes, I became totally confused. Upon further research on the internet, I learned that the original Marantz MA 9 was in fact a tube amp. Please help me understand how a clone of a tube amp became a solid state amp. I current have a McIntosh MC202 amp. Would this be a step backwards if I replace it with the Marantz?
There were actually two devices: tube pre called Marantz 9 and way later there was MA-9S and MA-9S2 that were solid state TOTL amps. This one is based on these solid state beauties. There are also Marantz 9 tube clones available on Ali, havent heard any of them yet
Another great review, thank you! I'd love to hear some reviews on other clone monoblocs if you get the chance - I was really hoping this one was available in mono configuration
Overall, yes. Closely followed by few others, depending on your music tastes some may be slightly better in some areas and slightly worse in others. I'd say that this Marantz reminds me of DartZeel in general sound presentation.
@@k4syx it is my hobby but this is not all .. I want the best but I have limited budget and time ..I was satisfied with the vintage gears but the TPA informed me the technology change and market change .. We all know $250 is nothing in this hobby .. but will I put half a million to buy the ultimate unit .. no I will get a better return from buying a rental house to create cash flow ...still I have limited budget and time .. I will still get the best ultimate unit or units for myself ..
@@Simplyveej Nothing to change, you'd have to use Y RCA splitter to get L channel signal to both inputs of one amp and R channel signal to the other amp the same way. Then you can use two sets of outputs from one amp for left speaker taps (two pairs for H and L connectors) and the same for right speaker.
YES a smart way to test a system, or indeed any of its components! So much artifact to be found in a choral recording - and of course instrument separation is an issue as itmight be with the largest symphony - and then ENSEMBLE effect - all might or could be parlayed by the engineer, the master, your source, then amp and speakers - and by whatever box you and the system are sitting in - I recommend a large open window, as room treatment!
I have ordered this amplifier to replace my old UK Rega amp. I am a little concerned about the input impedance of 15K because I will run a DAC with a tube buffer into it, but I would like to try it first before any modifications to the resistors. Do you think it will be safe with this setup?
Just cut the resistors and never look back, also, I've just made a video on volume bypass - should be available soon (I need to do description etc before making it public)
I'm looking at purchasing this amp now. one question, I plan on putting it on a wifi plug so I can power it on and off remotely and leaving the amp switched on. I understand powering the amp on and off like this by cutting the power could/will shorten it's life, but I this price I can live with that assuming I can get some years of enjoyment out of it. what are your thoughts on that? thank you sir!
I do the same thing using Tuya smart sockets. It doesnt matter for amps etc that have mechanical switches because you're doing exactly the same thing as switch and in arguably more controlled way :D
@@k4syx excellent, I'm planning on purchasing a wiim ultra streamer and running it into the inputs for a basic office system. so power consumption it's basically 6 watts idle and approximately 35 to 60 watts based on volume?
Make sure your wifi plug can pass 1.5A current minimum. If power transformer is rated 300VA, by 230V mains, you may draw up to 1.3A current when it plays loud and orchestra play tutti!...
@@rainham1 no when it's idle it's 60 and when playing it's 61-62. It's still low for an amplifier, but not so low that I would leave it on all the time. The switch on the front plate cuts the power completely. It will be a great office setup!
@@Wright00000 yes it is, it's just waiting in line. I'm doing these in my free time as I have regular job that pays for these, so just a free evening now and then when I can do a serious listening session. Recording video later is easier and quicker, but session when I'm listening, taking notes etc it does take a few hours
The Chines makes an error by construction: The Speakter Protection-Board must to the Backside and the Transformer to the front, so the cable ways will be very shorter and the sound will be bether, too.
The original was biased for full class A for lower output power - this one probably is the same (with scaled down output pwr) and then AB for high output pwr
@@k4syx It is 41.49. Just interesting, I see other reviewers adding some sample of playing musing on the amplifier. Is it interesting for viewers on your opinion? Or on UA-cam you won't get any difference? BTW - exceptional review and very interesting model. It is also might be interesting a power consumption between idle and average load.
@@ruslanmulyk8601 Thank you. When its noticable I am giving numbers on load/idle, here it was like 60 vs 61.5W so nothing significant. That amp is FM801 clone thats currently burning in - the chassis is the same as for DartZeel clone but this is FM clone. As for music samples. I am working on a set that would be able to record anything with acceptable quality, I already have ADC and I am waiting for matching pair of instrument microphones. The problem here is that mic (a good one) will have like 80dB SNR, ADC is 96dB here, and both of them have a frequency response thats not exactly flat (mic especially). Getting that flat would require EQuing the recording, which would make the whole process moot. And on top of that I'm trying to get recorded differences between amps having 0.005%THD and SNR in range of 120dB. I will try, as its fun and much to learn, but my brain whispers to me that it will be pointless because the mic will always be bottleneck and common denominator for all amps here: that what you will actually hear will not be traits and qualities of amp itself but the microphone. But Im not giving up!
It's like scaled down DartZeel. Similar overall signature but DartZeel is better across the board (and more expensive). But make no mistake , this Marantz clone eats raw regular amps with prices up to 1000-1500usd. These really are that good. And DartZeel is even better.
This one is better. More detail, better 3d (especially depth) and its very musical. A07Max on their own are very good but this is top of the line design. A07max will win when it comes to power usage though.
Thanks for your followup. Power isn't an issue as I don't listen above 80 db and my Paradigm speakers are quite efficient. How do you think this amp would match with my Monitor 7v4? They are older towers but have been good to me.
😢😢😢Apologies for this comment on this review but I thought it would have more chance of being ready . Well it finally arrived my MF A1 despite the tracking saying it was going back and forth between NL then UK then back to NL. I never thought it would arrive but it has and unfortunately it doesn't work, well it half works!!! The right channel sounds good already but no sound from the left channel. When switched on both LEDs flash, relays click and the amp is good to go but only one side of the chassis. The RHS gets warm not hot my V3 mono's get significantly hotter when using RCAs. But alas the LHS stays stone cold. Already the soundstage width is impressive, it's just a shame its mono!! When switching off the LHS LED flashes a lot longer than the RHS. If anyone can offer solutions that would be great. It's beautifully built and robust and although it was well packed in it's box complete with RCA cables, I also ordered a BRZHIFI L1 preamp which was again packed well. However both amps were packed in a larger box with no padding so would have moved around a lot in transit which may have caused the problem. I'm gutted as I've been so looking forward to receiving it. What should I do now? Do I raise a complaint with AliExpress and it's then up to them to resolve the issue with the BRZHIFI Official Store. How do disputes normally get resolved? This is only my second issue buying from AliExpress. By the way the BRZHIFI L1 class A preamp is working beautifully with the V3 monos and hopefully when I replace the NE5532 opamps with OPA828 it will work even better. Any advice would be gratefully received.
Yes contact the seller and describe the issue. Which shop was that one from? The one I recommended? Explain the problem, maybe record and send video and go for refund. In case of problems ask Ali to step in (it's all very easy actually and semi automatic when you open dispute). But before opening dispute just contact the seller. Ahhh and if you have any experience in the area remove the top lid and look for obvious problems like something disconnected, these sometimes have rough times in shipping
Hi. Thank you for your response. I will contact BRZHIFI Official Store first to see what can be done. I would really like a replacement as I think the A1 is a great amp and I have been running it in anyway and I love the sound as the soundstage is very wide and I'm starting to hear things I hadn't heard before in my auditioning tracks. My biggest concern is the cost of returning it to China and the length of time to get a replacement. If they agree I will open up the A1 to see if there is an obvious loose connection. Many thanks for your recommendation, my first impressions of the A1 is that it is beautifully built, despite the fact that only half of it works, and it's sound will only get better. Keep up the great work you are doing you are gaining followers all the time and the Chinese clone producers must be very pleased with your channel and recommendations. Have a great weekend.
Hi I hope you are having a good weekend. I emailed BRZHIFI but I haven't had a response yet but it is the weekend. Yesterday I powered up the MF A1 with just the power cable no source of speakers attached. Both red LEDs flashed then were fully light but after a couple of minutes the faulty channel light started flashing again and continues to flash. Does this give any clues as to what the fault could be? I asked BRZHIFI if I could open the amp to see if I could spot anything obvious. I wait for their response. Enjoy the rest of your weekend.
@@aurallychallenged Thanks! Unfortunately I have no idea what may be the cause of the problem :( They don't work in weekends so you'll probably get something tomorrow! Btw was that from the shop I recommended?
Yes choosing the right word is tricky here. These are not 1:1 copies (with some exemptions) but they are based on original designs: just with redesigned PCBs to fit DIY build and sometimes modifications based on experiences of the guys that have built them. These are mostly floating (schematics) over diy forums. This one has lower power output: some output power transistors pairs were removed leaving just two per channel
Good question that I've answered somewhere in the comments already :) I think this one has better 3d, TPA monos are on the other hand slightly faster and more detailed. But if you want them to sound this analog way as this Marantz clone, you need to invest in some class A discrete opamps and then it gets pricier. All in all I'd say these are trading blows here as equals. No clear and obvious winner by knockout.
@@igoryakunin685 oh I thought you were asking about tpa monos I was reviewing in my channel earlier. If youre asking about A70-like amps this beats them with no sweat. different league (at least for now, I strongly believe in d class future)
Not yet. I need to review two preamps more that I have in line. But so far, both Cary and JC2 would be very good choices as this Marantz clone is neutral. Maybe with a little nudge towards Cary (you can get it in silver) as you may scale it with tubes later too.
Hej. Słuchając Twojego opisu brzmienia wzmacniacza , odniosłem wrażenie , że nie ma jakiejś jednej wybitnej cechy , ale wszystkie jakie posiada są na poziomie co najmniej bardzo dobrym. Nie wiem czy zgodzisz się z moją opinią.
Yes, thats actually very good summary: Its not excelling anywhere at the expense of something else, but rather than that its very good across the board
@@k4syx Ok. Zaryzykuję zakup tego wzmacniacza ( D5 Pro poza zasięgiem finansowym i trochę przeraża mnie jego potęga). W połączeniu z nim i JBL Studio 270 ( które mają fajną , szeroką scenę , niezłe detale , ale obrazowanie 3D raczej skromne) , jaki preamp byłby właściwszy. JC2 - więcej szczegółów , czy C245 - lepsze obrazowanie - ale tu obawiam się , że moje kolumny głośnikowe będą ograniczeniem. Niestety ze względów finansowych nie będą to egzemplarze prezentowane prze Ciebie , ale klony bardziej budżetowe produkowane (?) przez ASYPDZSW lub BRZHIFI ( niestety nie mogę wstawić tu linków). Pozdrawiam i dziękuję za cierpliwość.
@@arturps2909 Definetely not C245, with A1, and that speakers that would be too much of a good thing. Too laid back I think. Id get here something with bite and clarity, so JC2, but beware that the sound quality heavily depends on the build. Try to look for the ones with the same PCB and cheaper chassis (but you wont get mundorfs there I think)
@@k4syx A1 ? Chyba MA-9 . Zacznę od samego wzmacniacza i ocenię jak brzmi z tym co mam , potem łatwiej będzie mi szukać przedwzmacniacza.Dziękuję za cenne uwagi. Pozdrawiam.
In a way, these are originals too. This is not a 1:1 copy. Its based on ideas and scheme of Marantz but its repurposed to be smaller, stereo, less output power and CHEAPER.
The shipping will vary by the country, I've seen that. Wait for some coupons - 11.11 is quite soon, and if you're EU based check the actual final price just before the payment as at that stage the price gets reduced by 23%VAT - in my case it usually covers while shipping fee all in all.
Beer is on me.......Thanks for your hard work!
Thank you!
You are very humble and yet, you are and awsome reviewer. Well structured, great content. Still waiting for your chart that you could have on a website linked to your channel like I've seen for other content type.😊 Thx for considering that.
Thank you!
That's actually a very good idea! I'll think that through, should be easy, the problem is that Q3 is always hectic in the office and I'll have some free time only just a few days before Christmas. But this definetely goes on my list!
Very nice video... thank you..... if we are not talking about money... just about quality of sound and soundstage overall - which one from those you reviewed up until today, you would prefer or choose most of the times for all day listening? jazz, blues, ambient electronic music.. no heavy metal and similar
We need a ranking for sure 😊
@@annebokma4637 thats coming but I need to review all of them, the worst thing would be to do a ranking and then insert something in the middle or at the top later on (id expect crowds with torches and spikes at my door then)
For those, I guess something like FM300A, E405 and - low power! - MF A1, JLH1969 (the one I tested!) or this baby. The others are faster, harder, more 3d maybe, but these will shine in everything mid range.
The most relaxed and probably best match would be E405 - most expensive of the bunch!
@@k4syx nobody complains about the hot 100 and that changes all the time 😁 besides your work will never be done. And a running indication of your preference (and specially disliked) can give someone who wants to buy now a valuable resource.
Just my 2 cents , keep up the good work 👍
@@k4syx even in clone land, more quality is usually more expensive 😎
When I opened up my Marantz clone amp to remove the resistors they were absent from the build. Perhaps they read your comments and omotted them recently. I did disconnect the volume pot as you suggested. Thanks for the detailed info on how to do this. It was a very quick tweek. I am enjoying listening to all my favorite trracks with this new setup to pick up ob detail i haven't noticed in the past. So thanks for the recommendation.
Thanks!
LOL that resistor thing is crazy :D
This review was indeed a pleasure. Apparently, there is a place for AI. That is in determining the genre and characteristics of a song about to play and amp-switching to the correct one based on rock, choral, dynamics, bass, etc. That can be your next project! Thanks for the recommendation of Sylvia Hotel, Human and Baba Yetu (the Lords Prayer, see also diff version by Aquabella). Great job!
@@EvenHarmonics I was thinking about doing a video on tracks that I use for my tests, as I could explain what to look for in them and why these are IMHO great as benchmarks.
And they are great music too:)
Ahh yes, they used resistors on pots between the wiper and ground as a law faking resistor. When used with a high value linear resistor pot say 100-200Kohm and you use say 10-22K resistor it allows better left to right matching and acting as a Logarithmic type. It was a trick used in 70's-80's as a result of poorly L-R matched Logarithmic types.
Here resistors are straight between input and ground. So these are in paralel with entire pot - unless pot is applied differently than usually... So what is the sense for that? No idea!
@@yellow_noise3 strange
That was the only explanation I could see. It just doesnt make any other sense and it looks like last stage unexpected addon. But the pot is really cheap and its really, really linear and thus BOOOOORING.
Woe is me. Today my amp decided to fail after three days of listening. Started with speaker noise, moved to terrible distortion, then started have erratic volume. So disappointed as I really liked the sound when it was working. Sending it back tomorrow. So sad! Is this a buyer beware moment with clones?
@davidkellerman1316 I wonder what could happen. Was that for both channels at the same time?
Board has two separate channels, maybe it was power supply PCB (if yes). Can you keep me posted with any info you will get from the shop?
I'm enjoying your video's,I primary building Amplifiers,Power Supplies along with DACs while experimenting with SMPS over Linear.
Using separate boxes change everything PreAmp, Amps,DACs all have top performance with separation from heat & EMI and common mode noise.
Input matching is problematic in Audio.. and example is matching a water hose with running water into another without a spilling
Thank you!
I was going crazy waiting for you to show the face plate and rear panel from straight ahead instead of looking down at a sharp angle.
Point taken! :)
Could you please compare the detail and spatial information of this MA-9S against the A1?
Thank you for the great review!
I will do a set of comparison videos once I will finish single reviews :)
The goal is to have a table with scores in areas I discuss in my reviews so everyone will be able to pick their poison :)
Thanks, for adding details about the tracks you used. I've looked them up and added them to my test tracks - they sound great!
I don't see the test track list?
A nice titanium grid sheet on top would look great and help with heat distribution 😉
I was thinking along similiar lines, to get the top lid to laser or CNC guys and add some fancy shaped vents. Its cheap and effective
Is there any value in getting a second set of ‘fins’ for the left side from the manufacturer, as the amp is not too large, or would that not help significantly in the heat dissipation.
Or put a little thermal paste (the usual one) in the contact of the top cover with the heatsink
@@matytinman Interesing idea and a simple one, I have a cuple of tubes of Arctic Silver but that would be a total overkill :D
@@EvenHarmonics No I dont think so, the other side is quite cool, its far from power transistors. I think rotating the ampand heating to get them to topside may help. Gotta try that over the weekend!
Another very insightful review. Great! :) I have two questions:
1. So the Marantz clone is more refined in sound (detailed) thane Burmesters clone after removing those resistors?
2. Will you also remove a volume potentiometer from JLH 1969 circuit , so making it a true power amp? What can bring this to the sound? I am thinkng to try with mine amp, but I am not an electrician. But there are some specialists for hi-fi...
@@majtextwriter1794 Thank you!
Yes I think Marantz clone is more refined, 933 is wilder, so the music genres play a role here too.
I wasn't thinking about bypassing volume pot on 1969 as I thought that it may be handy in such a small desktop amp. I'd have to take a look inside of that's something as easy as it was with Musical Fidelity A1 clone
Again, thank you for your effort! Just curious about some of those caps. They don’t look new. Do you know where the manufacturer is scavenging those parts from?
No these look fine actually, but yes, in Musical Fidelity A1 clone and 1969 Hood they definetely used some recycled caps. Which is fine by me, Id rather take recycled EPCOS than brand new Sangxwa (or any other of many very very cheap caps)
중국인들은 타사의 제품과 부품까지 카피하는데 익숙합니다.
how does it compare with zero zone mono blocks ?
Ouch thats a very tough question. Monos are faster, a little more detailed, but this one has better imaging. And monos require better opamps to sound best. But they also use less power and are smaller, and cooler. A good one, I will have to compare them head to head.
I am planning to do summaries for amps in the same or similiar price brackets so something like that is coming here.
Every time you touch the heat sink, I think my bell is going off. Why don't they make mono blocks like the original? Could these be bridged to mono?
Price I guess! you can get these in DIY with mono PCBs, but fore ready made device 2 monos = 2x chassis, 2xpower supply so the price goes significantly up. And then going with two monos would also beg for best possible quality parts because if not, then theres no sense in going this way anyway :D
On which speakers did the amp cut out twice? Maybe low impedance at LF
It was on Logans and 35XTi, but that was not at the max volume. But there may be something actually here, I have to check impedance curve for 35XTi
@@k4syx Audioholics: MartinLogan Motion 35XTi Bookshelf Speaker Review
Minimum impedance: 5.5 Ohms at 180 Hz. True 88.2 dB/2.83V/1m sensitivity. Easy to drive. 🤔
[ The above graphs show the electrical behavior of the MartinLogan 35XTi speakers. MartinLogan characterizes these as 4-ohm speakers, and I find that to be a very conservative rating. They could easily have specified these to have a 6-ohm nominal load, and I would not have argued. The minima occur at 180 Hz at just a hair under 5 ohms, but that is with a not-terrible phase angle. Most amplifiers, even cheap ones, should be able to drive these speakers just fine. This might be a tough load for a cheap amp to push at a high drive level for a long time, but other than that, it’s not something to worry about (not that anyone is going to use a $1,300 speaker set with an entry-level amplifier). Port tuning looks to be a bit above 60 Hz.
I measured the 35XTi speaker’s sensitivity at 88.2 dB for 2.83v at 1 meter which is lower than MartinLogan’s spec of 92 dB for 2.83v at 1 meter. That is a fairly significant difference, but 88.2 is still a bit above average for bookshelf speakers in this class. ]
Much enjoyed, but hope you don't mind my asking a few questions:
1. What class is this amplifier?
2. Do I understand you correctly that this amp uses only a little more power than an old 60W incandescent light bulb did? If so, that's not at all bad - about the same as my class A preamp.
3. Again, and just to be sure, to get the best out of this amp, is essentially the main thing to cut the two resistors you mentioned?
Incidentally, they won't deliver to the UK from the shop you link to, but other shops on Aliexpress will.
The old Marantz was an AB, if I remember correctly. With 300w I can't imagine it being any other kind. This clone is based on that and doesn't get hot or use a boatload of power, so AB too
Its AB, though I've found some info that orignal (and maybe this one too) was biased to be in class A for lower output power. Yes its quite efficient when it comes to power requirements (with my listnening levels).
Yes cut them and loose them :)
@@k4syx now that class A with lower power would be very interesting. I didn't get what estats you have. It is a bit heavy for the ESL 57 and a bit light for the acoustat x.
@@k4syx Thank you for the info. May take a punt on one.
@@annebokma4637 he has Martin Logan Ascent Electrostatic speakers he is hoping to drive well on this journey. I have ‘Theos’. Others, please comment if you have electrostats
I wonder if you can use acetone to mute the logo and some graphics on the front panel. Great review. Thanks!
Thanks! The current one looks like laser engravement, you'd need to sand the whole panel to remove that. Doable. And you can add your thing the same way.
You could just get a CNC service cut you a new front panel :p
This one reminds me of old Heed/Naim shoe-box amplifiers. I received my FM255 clone preamp yesterday by the way. Dead silent background and it sounds awesome. Looking forward to your review as the design of mine is not exactly the same as yours.
Very cool! 😁 A friend of mine bought a Dart Zeel amp clone from LHY. It's heavy as hell and the parts and casework are top shelf. LHY charges considerably more for their version ($1600/$2100 shipped) but it sounds superb.
I'll have to try it one day, I've seen those that are looking like 1:1 copies too
Are they trying to lower the input impedance to stop noise or keep it from varying dependent on the volume setting, or if you directly connect it to the power amp board there will still see a load.
I've bypassed the volume pot today (there will be a video on that) so I'll measure it again going straight for the board
@@k4syx Could be some weird hf/r.f oscillations without it. They must have needed it, perhaps for reasons that are not immediately obvious. 47k would be easier to understand.
@@johnshaw359 yes I was going over it again and again and I cant get to anything better than making pot logarithmic. Everything works fine without them and it sounds waaay better too.
@@k4syx OK.
It was the strangest thing. Voices started to accentuate at strange times. What put me onto to the problem is I was doing some late night listening at very low volume, amp still wide open, controlled with preamp, and I started to hear noise thru my speakers. At the very low levels it was quite noticeable. I checked all my other equipment. Even went back to my two mono block Aiyma's. The noise was from the MA-9 amp. Then later I lost almost all my volume. Then when it came back sound was quite distorted. Very disappointed as I really loved the sound - just as you had reviewed. I doubt I will hear back as I asked for a refund. Aliexpress allows free refunds and free shipping within first 14 days. Missing this window would set me back expensive shipping. In that regard I feel better purchasing from Amazon when I can. Do you have any other recommendations for an amp of similar character? I saw the DartSel clone was on sale, but the shipping is a killer.
In such cases its better to go for refund as you did just to be on the safe side, though these guys to repair stuff too. Amazon has longer return window so for many things that Im not 100% sure if I will like them I get them here. As for amp, DarZeel clone is king of the hill so far, and in some ways similiar to Marantz clone, but yes both the amp and the shipping are more expensive (its also like more than two times heavier and bigger)
Thanks!
Thank you!!
Nice review, congratulations. How high is the power consumption in idle and working mode?
Its in the video, cant remember the numbers now. What I do remember is that difference was insignificant (with my volume listening levels)
60 watts roughly for both
Thank you for a very enlighten video. I was about to order a MA 9 from Aliexpress. But when I saw the specs on their website that mentioned tubes, I became totally confused. Upon further research on the internet, I learned that the original Marantz MA 9 was in fact a tube amp. Please help me understand how a clone of a tube amp became a solid state amp.
I current have a McIntosh MC202 amp. Would this be a step backwards if I replace it with the Marantz?
There were actually two devices: tube pre called Marantz 9 and way later there was MA-9S and MA-9S2 that were solid state TOTL amps.
This one is based on these solid state beauties.
There are also Marantz 9 tube clones available on Ali, havent heard any of them yet
The Aliexpress site claims an input impedance of 100k, which would make it nice for a tube preamp input. Can you verify this specification? Thank you
I think it was in the video, when you'll remove the bridge its excatly 100k, with bridge its 15k (and highly recommend removing that one)
Another great review, thank you! I'd love to hear some reviews on other clone monoblocs if you get the chance - I was really hoping this one was available in mono configuration
@@pauljoyce4857 Thanks! Actually I have Quad 405 in twin "mono" version waiting to be reviewed :)
@@k4syx Wonderful! I'll be very much looking forward to that, thank you!
@@k4syxA clone of those or originals?
Dartzeel D5 Pro still the best clone you tried ?
Overall, yes. Closely followed by few others, depending on your music tastes some may be slightly better in some areas and slightly worse in others. I'd say that this Marantz reminds me of DartZeel in general sound presentation.
Sounds so good. Maybe buy two of them to play biamps
Interesting idea, these are supposed to be 120W, so I could drive my electrostats even better.
@@k4syx it is my hobby but this is not all .. I want the best but I have limited budget and time ..I was satisfied with the vintage gears but the TPA informed me the technology change and market change ..
We all know $250 is nothing in this hobby .. but will I put half a million to buy the ultimate unit .. no I will get a better return from buying a rental house to create cash flow ...still I have limited budget and time .. I will still get the best ultimate unit or units for myself ..
How would we use two as a bi-amps? Anything to change inside?
@@Simplyveej Nothing to change, you'd have to use Y RCA splitter to get L channel signal to both inputs of one amp and R channel signal to the other amp the same way. Then you can use two sets of outputs from one amp for left speaker taps (two pairs for H and L connectors) and the same for right speaker.
@@k4syx Thank you, sir! You’re the best!
YES a smart way to test a system, or indeed any of its components! So much artifact to be found in a choral recording - and of course instrument separation is an issue as itmight be with the largest symphony - and then ENSEMBLE effect - all might or could be parlayed by the engineer, the master, your source, then amp and speakers - and by whatever box you and the system are sitting in - I recommend a large open window, as room treatment!
Thanks!
@@k4syx or at least an open door - IE a sdamped & ported cabinet!
I didnt hear you say, but is the knob on the fronr for volume/ gain? I see inputs so maybe this is a single input integrated
Its for volume, its power amp with single set of inputs and pot in line with inputs
appreciate your knowledge and commentary.
Thanks!
I have ordered this amplifier to replace my old UK Rega amp. I am a little concerned about the input impedance of 15K because I will run a DAC with a tube buffer into it, but I would like to try it first before any modifications to the resistors. Do you think it will be safe with this setup?
Just cut the resistors and never look back, also, I've just made a video on volume bypass - should be available soon (I need to do description etc before making it public)
I'm looking at purchasing this amp now. one question, I plan on putting it on a wifi plug so I can power it on and off remotely and leaving the amp switched on. I understand powering the amp on and off like this by cutting the power could/will shorten it's life, but I this price I can live with that assuming I can get some years of enjoyment out of it. what are your thoughts on that? thank you sir!
I do the same thing using Tuya smart sockets. It doesnt matter for amps etc that have mechanical switches because you're doing exactly the same thing as switch and in arguably more controlled way :D
@@k4syx excellent, I'm planning on purchasing a wiim ultra streamer and running it into the inputs for a basic office system. so power consumption it's basically 6 watts idle and approximately 35 to 60 watts based on volume?
Make sure your wifi plug can pass 1.5A current minimum. If power transformer is rated 300VA, by 230V mains, you may draw up to 1.3A current when it plays loud and orchestra play tutti!...
@@yellow_noise3 Roger that! thanks. one of my Wi-Fi sockets actually can run up to 16 amps .I used to run our espresso maker from it remotely.
@@rainham1 no when it's idle it's 60 and when playing it's 61-62. It's still low for an amplifier, but not so low that I would leave it on all the time. The switch on the front plate cuts the power completely.
It will be a great office setup!
Looking forward to your comparison of all your amp clones
Me too! :)
@@k4syx me three! By the way, is the Gryphon review still on the works? Definitely curious about that one!
@@Wright00000 yes it is, it's just waiting in line. I'm doing these in my free time as I have regular job that pays for these, so just a free evening now and then when I can do a serious listening session. Recording video later is easier and quicker, but session when I'm listening, taking notes etc it does take a few hours
@@k4syx understood and no hurry! We appreciate your service!!
I received my amp and I'm burning it in. Do you still suggest disconnecting volume control and resistors by the inputs? Any disadvantages?
Yes its still my recommendations, no disadvantages, but you need pre od DAC with volume control. Other than that - only positives! :)
The Chines makes an error by construction: The Speakter Protection-Board must to the Backside and the Transformer to the front, so the cable ways will be very shorter and the sound will be bether, too.
I think thats just by design, so it will be a little cheaper to produce (board and all connections). I think so.
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Looks awesome! I think I'll look into getting one. Thanks for the video and content. Is this a class AB amp?
The original was biased for full class A for lower output power - this one probably is the same (with scaled down output pwr) and then AB for high output pwr
I like your system. Which exactly black amplifier is? Could you share the brand of it?
Which one (give me timestamp in the video as there are a few of black boxes in the background :) )
@@k4syx It is 41.49. Just interesting, I see other reviewers adding some sample of playing musing on the amplifier. Is it interesting for viewers on your opinion? Or on UA-cam you won't get any difference? BTW - exceptional review and very interesting model. It is also might be interesting a power consumption between idle and average load.
@@ruslanmulyk8601 Thank you. When its noticable I am giving numbers on load/idle, here it was like 60 vs 61.5W so nothing significant. That amp is FM801 clone thats currently burning in - the chassis is the same as for DartZeel clone but this is FM clone. As for music samples. I am working on a set that would be able to record anything with acceptable quality, I already have ADC and I am waiting for matching pair of instrument microphones. The problem here is that mic (a good one) will have like 80dB SNR, ADC is 96dB here, and both of them have a frequency response thats not exactly flat (mic especially). Getting that flat would require EQuing the recording, which would make the whole process moot.
And on top of that I'm trying to get recorded differences between amps having 0.005%THD and SNR in range of 120dB.
I will try, as its fun and much to learn, but my brain whispers to me that it will be pointless because the mic will always be bottleneck and common denominator for all amps here: that what you will actually hear will not be traits and qualities of amp itself but the microphone.
But Im not giving up!
Hello! How does compare to dartzeel 108 in terms of sound quality?
It's like scaled down DartZeel. Similar overall signature but DartZeel is better across the board (and more expensive).
But make no mistake , this Marantz clone eats raw regular amps with prices up to 1000-1500usd.
These really are that good. And DartZeel is even better.
How does this Marantz clone compare with using two Aiyma a07 max as mono blocks? Can you give me any specific advantages?
This one is better. More detail, better 3d (especially depth) and its very musical. A07Max on their own are very good but this is top of the line design. A07max will win when it comes to power usage though.
Thanks for your followup. Power isn't an issue as I don't listen above 80 db and my Paradigm speakers are quite efficient. How do you think this amp would match with my Monitor 7v4? They are older towers but have been good to me.
@@davidkellerman1316 you'll be fine, this is nice and quite powerfull amp and with that volume levels it will be perfecly fine.
How does it sound??? Probly not very good
Actually, very good, superb value.
Hmmm. What does the video say?
didnt you listen lol
@@mash5702 This may be his first troll !
😢😢😢Apologies for this comment on this review but I thought it would have more chance of being ready
.
Well it finally arrived my MF A1 despite the tracking saying it was going back and forth between NL then UK then back to NL. I never thought it would arrive but it has and unfortunately it doesn't work, well it half works!!! The right channel sounds good already but no sound from the left channel. When switched on both LEDs flash, relays click and the amp is good to go but only one side of the chassis. The RHS gets warm not hot my V3 mono's get significantly hotter when using RCAs.
But alas the LHS stays stone cold. Already the soundstage width is impressive, it's just a shame its mono!! When switching off the LHS LED flashes a lot longer than the RHS.
If anyone can offer solutions that would be great. It's beautifully built and robust and although it was well packed in it's box complete with RCA cables, I also ordered a BRZHIFI L1 preamp which was again packed well. However both amps were packed in a larger box with no padding so would have moved around a lot in transit which may have caused the problem. I'm gutted as I've been so looking forward to receiving it.
What should I do now? Do I raise a complaint with AliExpress and it's then up to them to resolve the issue with the BRZHIFI Official Store. How do disputes normally get resolved? This is only my second issue buying from AliExpress.
By the way the BRZHIFI L1 class A preamp is working beautifully with the V3 monos and hopefully when I replace the NE5532 opamps with OPA828 it will work even better.
Any advice would be gratefully received.
Yes contact the seller and describe the issue. Which shop was that one from? The one I recommended?
Explain the problem, maybe record and send video and go for refund. In case of problems ask Ali to step in (it's all very easy actually and semi automatic when you open dispute). But before opening dispute just contact the seller.
Ahhh and if you have any experience in the area remove the top lid and look for obvious problems like something disconnected, these sometimes have rough times in shipping
Hi. Thank you for your response. I will contact BRZHIFI Official Store first to see what can be done. I would really like a replacement as I think the A1 is a great amp and I have been running it in anyway and I love the sound as the soundstage is very wide and I'm starting to hear things I hadn't heard before in my auditioning tracks.
My biggest concern is the cost of returning it to China and the length of time to get a replacement.
If they agree I will open up the A1 to see if there is an obvious loose connection.
Many thanks for your recommendation, my first impressions of the A1 is that it is beautifully built, despite the fact that only half of it works, and it's sound will only get better.
Keep up the great work you are doing you are gaining followers all the time and the Chinese clone producers must be very pleased with your channel and recommendations.
Have a great weekend.
Hi I hope you are having a good weekend.
I emailed BRZHIFI but I haven't had a response yet but it is the weekend.
Yesterday I powered up the MF A1 with just the power cable no source of speakers attached. Both red LEDs flashed then were fully light but after a couple of minutes the faulty channel light started flashing again and continues to flash.
Does this give any clues as to what the fault could be?
I asked BRZHIFI if I could open the amp to see if I could spot anything obvious. I wait for their response.
Enjoy the rest of your weekend.
@@aurallychallenged Thanks! Unfortunately I have no idea what may be the cause of the problem :(
They don't work in weekends so you'll probably get something tomorrow!
Btw was that from the shop I recommended?
Thanks for such a quick reply. I just wondered whether it was significant. Enjoy your evening.
Not sure how one can call a 70 watt amp a clone of a 300 watts but it does look like incredible value nonetheless.
Yes choosing the right word is tricky here. These are not 1:1 copies (with some exemptions) but they are based on original designs: just with redesigned PCBs to fit DIY build and sometimes modifications based on experiences of the guys that have built them. These are mostly floating (schematics) over diy forums. This one has lower power output: some output power transistors pairs were removed leaving just two per channel
this amp being slightly on the warmer side would it pair well with Sony scc5"s?
I would think this one will pair good with 99% of speakers, its not overdone in any direction :)
How does it compare to the new small class-d TPA3255 amps?
Good question that I've answered somewhere in the comments already :)
I think this one has better 3d, TPA monos are on the other hand slightly faster and more detailed. But if you want them to sound this analog way as this Marantz clone, you need to invest in some class A discrete opamps and then it gets pricier. All in all I'd say these are trading blows here as equals. No clear and obvious winner by knockout.
@@k4syx thank you brother
I have a a70 with akliam lc5's, sounds fine, I need set up room correction with REW before thinking of new amps, but its so tempting...
@@igoryakunin685 oh I thought you were asking about tpa monos I was reviewing in my channel earlier. If youre asking about A70-like amps this beats them with no sweat. different league (at least for now, I strongly believe in d class future)
Love your reviews! Any recommendations yet as to which pre-amp would be a good match?
Not yet. I need to review two preamps more that I have in line.
But so far, both Cary and JC2 would be very good choices as this Marantz clone is neutral. Maybe with a little nudge towards Cary (you can get it in silver) as you may scale it with tubes later too.
Hej. Słuchając Twojego opisu brzmienia wzmacniacza , odniosłem wrażenie , że nie ma jakiejś jednej wybitnej cechy , ale wszystkie jakie posiada są na poziomie co najmniej bardzo dobrym. Nie wiem czy zgodzisz się z moją opinią.
Yes, thats actually very good summary: Its not excelling anywhere at the expense of something else, but rather than that its very good across the board
@@k4syx Ok. Zaryzykuję zakup tego wzmacniacza ( D5 Pro poza zasięgiem finansowym i trochę przeraża mnie jego potęga). W połączeniu z nim i JBL Studio 270 ( które mają fajną , szeroką scenę , niezłe detale , ale obrazowanie 3D raczej skromne) , jaki preamp byłby właściwszy. JC2 - więcej szczegółów , czy C245 - lepsze obrazowanie - ale tu obawiam się , że moje kolumny głośnikowe będą ograniczeniem. Niestety ze względów finansowych nie będą to egzemplarze prezentowane prze Ciebie , ale klony bardziej budżetowe produkowane (?) przez ASYPDZSW lub BRZHIFI ( niestety nie mogę wstawić tu linków). Pozdrawiam i dziękuję za cierpliwość.
@@arturps2909 Definetely not C245, with A1, and that speakers that would be too much of a good thing. Too laid back I think. Id get here something with bite and clarity, so JC2, but beware that the sound quality heavily depends on the build. Try to look for the ones with the same PCB and cheaper chassis (but you wont get mundorfs there I think)
@@k4syx A1 ? Chyba MA-9 . Zacznę od samego wzmacniacza i ocenię jak brzmi z tym co mam , potem łatwiej będzie mi szukać przedwzmacniacza.Dziękuję za cenne uwagi. Pozdrawiam.
@@arturps2909 Fakt, that was my mistake. Thats good path - MA9 and pre in time, though you will be very happy even without it.
I firmly believe no point to buy original stereo equipments.
As long as it’s sold as a copy, I see no problem with purchasing either.
In a way, these are originals too. This is not a 1:1 copy. Its based on ideas and scheme of Marantz but its repurposed to be smaller, stereo, less output power and CHEAPER.
Thank you so much! Your channel is an eye opener!
I want black gear 😞 preferably without a volume knob 😂
My kind of guy! Same preferences here :D
@@k4syx I typed that before you showed the shortcut for the volume. But a front without volume knob is just easier to paint 😈
@@annebokma4637 Don't give me any ideas like that ;)
The video for volume bypass is already scheduled :)
@@k4syx will watch it, and knowing me comment 🤣
This would look lovely in pink as well, the partner acceptance factor satisfied. 😎
just tried to buy one and its listed at $181 plus $99 shipping for total $280! Not cool!
same here
The shipping will vary by the country, I've seen that. Wait for some coupons - 11.11 is quite soon, and if you're EU based check the actual final price just before the payment as at that stage the price gets reduced by 23%VAT - in my case it usually covers while shipping fee all in all.
@@k4syx good advice. at least the nice thing is to my country the shipping from Ali is FedEx and can be here in under 10 days
@@k4syx Ok, will wait, btw, I'm in the U.S. and quite happy with the A-1 clone you recommended. Thank you for your hard work!
@@rainham1 where are you from? Which country?