Amazon purchase link-- amzn.to/3O5qfVf Official purchase link---- bit.ly/fosiaudiov3 Aliexpress purchase link- www.aliexpress.com/item/1005005605031795.html 12$ off promo code: FAV3ZRS12 (works for all platforms) ⚔www.SubscribeStar.com/Zeos -- Support the Channel on SubscribeStar 🥇www.Patreon.com/Zeos -- Support the Channel on Patreon
The real revolution is the Texas Instruments IC chips that these low cost high performance amplifiers are built around. Kudos to Fosi & Ayima in applying those chips, pioneering low cost & high performance amplifier products. Established companies (like Yamaha, etc.) need to do the same with their receivers, lowering cost & raising performance at the same time. Credit companies like Texas Instruments (❤ to Texas), who is continuing to design better class D amplifiers while keeping the cost low, charging just $6 per chip from Mauser electronics. We live in a new golden age of amplifiers.
For the record, into 4 ohms the V3 has been measured at ~140W per channel with the 48v power supply. It's around 60W per channel with the stock PSU. Not that it matters unless you have a huge impedance spike in your speakers response
I’ve been playing with the V3 for a while using the 48V 5A power supply and let me tell you, this thing really benefits from active cooling. When it gets warm the sound quality falls apart quite a bit. What I discovered is that a computer fan set at a low speed brings the case down to near ambient temps so it doesn’t take much but it’s really worth doing.
if your v3 is getting very hot i would recommend trying new thermal paste and adding some to the metal that touches the case in between the heatsink and case has none. i did this to mine when i swapped opamps to OPA1656. but my main point is im running the v3 with 48v 7.3a and was using it with a 48v 10a and never had a problem with heat at all, my dac gets more warm in the stack than the v3
I have not noticed this at all and i get loud enough for me. 85 to 90db. Maybe you are even talking louder. I don't play thunderously loud metal music or anything though so maybe that is the difference. I do love good bass slam and this little amp delivers. Shocked actually!
Z, thanks for finally linking something to look at your homemade cable, been wondering what that was for WEEKS. That's how you run headphones off of any of your speaker amps??
I wanted to support you with your Amazon link Zeos but Amazon screwed me on delivering my BT20a Pro(to replace Topping MX3 powering RB42's from previous recommendations), so I ended up cancelling the order and order directly from Fosi for $115.99 with the 48V power supply vs $99.99 on Amazon with the 32V power supply.
I'd like to test if the variable power supply is changing anything itself. In other words test it with the bricks Fosi sells. And for speakers use Klipsch (high sensitivity) vs Micca RB42. I can tell you because I tried the speakers, the Miccas walk all over the Klipsch but you have to crank the volume knob to do it. With Miccas you really need the 48v brick, with Klipsch you don't. They both sound good depending on if you like the speakers sound signature. edit: wrote this before I saw the entire video
i run two v3s from a schiit syn to get surround sound (two polk psw-10s, two polk es-30s , polk cs-10? for center and some polk blackstone for surrounds. my mains sparkos v3 amp has a 48v power supply and i do use a cheap beringer 9 band eq for tweaking. i gotta say every time i think i might replace it with something....when i dial it in, i get a fantastic sound and say, ok...im good. i get no hiss at all. for a small black metal box for 100 usd.....it really does deliver.
Just bought the V3 along with those $99 Jamo S803 yesterday. Probably way overkill, figure it'll handle beefier speakers when I upgrade down the road. Now considering swapping the V3 for the BT20a Pro for the tone controls.
I have both but prefer the V3. Z repeatedly said the V3 and BT20A Pro have the same internals, they do not. Looks up photos, the V3 has two massive caps the size of your thumbs, the BT20A Pro does not. Also see ASR measurements, both are better than the TB10D but the V3 is king and you can hear it. I’m a little surprised Z didn’t hear it. When listening to both the V3 has better, flatter bass extension with a slightly cleaner, more delicate sound. The tone controls are pretty nice on the BT20A Pro but I’d still recommend the V3 over it if you can work on your room to minimize you need for EQ. The BT has a really inconvenient Bluetooth implementation, it is very annoying to switch between inputs because as soon as the device is on it connects. Reset to unpair. Works fine in either mode, just not both regularly.
Something tells me that your 48v silver power supply that you built is way better than the 48v power supply that they sell you for $50. Could be wrong but yours looks like a tank of engineering. I have the V3 and would be tempted to by the RB42's if that $50 48v power supply were actually really a good one. Anybody?
Most popular amp? Not the V3. The A07 sold 1000 times more and they are both as good as their below $100 price (class D). Good but not great. The BasX is great (class A/B).
One thing that is important is that lab ppwer supply is no doubt better than the ppwer bricks they send with everything these days. One potential reason why it's more quiet. I have thought of getting a big lab ppwer supply in the past for diy projects or for powering other things. Most of them have great specs, they are cheap and so many brands as they have been making them for many years. Thanks for the entertainment !
That pass through is no more than a Y cable. Nothing you send into the RCA goes into the Amp to come out the 3.5. You can actually use the 3.5mm as an input as well.
I'm sold micca rb42 and the fosi v3 with the 48v power supply for the extra $50.. but I'd like to use my phone or my tablet as music source what you guys recommend? Something on the price range like this fosi would be awesome.. 😎
Since you were the one who turned me on to Micca RB42s, I have to tell you they sound awesome with a BT20a Pro. I had them with a Klipsch R-100sw but they didn't need it at all. I'm using the stock 32v power supply so I had to turn the volume up to 3/4 but it sounded awesome. I'm using Klipsch R-41ms until I upgrade the power supply (I want the Sparkos op amps too), but they need the sub and imho don't sound as good as the MIccas loud. edit: wrote this before I saw the entire video.
@@fosiaudio I was just trying to say I had to turn the knob farther with the Miccas than I do with the Klipsch to get the same sound levels. With the Klispch I don''t feel like i need the 48v power supply, but I do need the powered subwoofer. With the Micca RB42s I needed the 48v power supply but not the subwoofer. My plan is to do it all. RB42 plus 48v plus Sparkos op amp plus Klipsch subwoofer. Wiim mini to SMSL SU-1 for source.
The bass was weak on electronic music compared to my class AB amplifier. I just ordered the other 48v power supply. So far the mids are ok but bass is poor. I'll update.
@@ZReviews JBL 4312 SE with 12 inch woofers. Might be still a tall order for these 90 DB 6 ohm speakers which are doing great with my Chord Anni @10 watts. Class AB. Have also ordered the Burson Audio time keepers monoblocks @30 watts pure Class A. So I will arrange a shootout soon!
Yay, I'm sooo glad you and Fosi got in touch for this as I tried to tell ya about it in email, lol. They had like 20 of their customers provide input on something next level. The swappable op amps are even better with Sparkos. The heatsink is now away from capacitors underneath the board and better airflow means less deterioration of the caps long term. Have you seen the guts inside? Top shelf... so happy my favorite reviewer got his hands on a product I feel a part of and thanks to Fosi for their listening and production of something so valuable for the price point. They even are now an authorized resales for Sparkos op amps since so many swap for them, so the future looks pretty interesting
I would not stretch too much and say the V3 components are Top Shelf, there is still room for improvement. Its Elna capacitors are the bottom of Elna audio grade capacitors. The Elna Silmic II, Those are top shelf, or Nichicon Muse UKZ or Fine Gold UFG. But I get your point, the V3 uses better components than the competition and other Fosi amplifiers. If you are handy at Soldering, you could replace those components yourself.
The amp using the 48 v power supply puts out 161 watts & headroom 191 watts reviewed by audioscience. The smsl a300 in bride mode put out 400 watts per channel.
Tank Girl Background! Woot! Hard to Drive 4 ohm Speakers? Magnepans are kinda the go too for hard to drive speakers. Mid 90s Thiel speakers had a reputation for being hard to drive as well.
There is more bad with the pass-through. Please test this yourself if you can. First... The pass-through works both ways... You can input via the 3.5mm too. Then you would use the RCA as outputs. Just like the Aiyima A07. It is really only a Y cable. Not even a line out. So here is the nail in the V3 coffin. I found out last night that the RCA and 3.5mm pass-through of the V3 are wired wrong and when another device is plugged into the V3, while conducting an isolated L-R stereo separation test, reveals the crossed signals. This error doesn't happen when you only use the RCA(or 3.5mm) input alone... But as soon as you plug something into the V3 for output... L-R tests reveal the cross-fed signals. When testing, the left channel will play and a reduced signal will play in the right channel too and vice versa. This should not happen. Fosi Audio obviously copied the original circuit layout of the Aiyima A07. The A07 also had this error in their first run... They did fix it... So they say... For Shame Fosi! You will have to split your signal before your V3 and feed your secondary device that way. You cannot use the pass-through in the V3. The entire first run of this device is junk for anyone needing that pass-through to work as intended. Buyer Beware!
On my Elac unifi 5.2's i had to nearly max the fosi. They sounded good but i don't like playing at 90% max volume on max gain from my pre, i like my headroom. My Aiyima A08 pro LOVES the 48v power supply and i'm running at about 33% less on the volume from the stock 32v PS.
I bought the hype, bought one of these V3 amps, and I think it is a piece of garbage. Weak power, crap sound. I thought it may be defective so I sent it back and bought a bt20a pro. Just as terrible.
just wondering, i was about to get a pair of speakers and im torn btw thos Micca RB42 (would get the BT20a) and the Edifier 1700BT, which one is better?
I have the rb42 powered by the v3 and they leave the 1700bt for dead. Not even in the same league. Sound is balanced and you are better of with the better sound quality than tone controls.
The internals and engineering of the v3 is the most diferential aspect vs other amps with the same chip. Haven't tried it, but the general opinion seems to be it has an overall better performance because of that.
Yes. The V3 is the first to offer a decent quality components: coupling capacitors and output filters inductors and capacitors. All these amplifiers have a very similar design. The difference lies on the components. Having said so, you can always upgrade your amplifier components to whatever you prefer. The problem with the BT20a pro is Fosi failed on the coupling capacitors and on the output filter capacitors. But they did correct them on the V3. Unfortunately, there is no room for inductors upgrade like Wurth or Coilcraft (expensive ones) like the ones Topping used on the PA5. Those inductors make all the difference in the world. The A07 does have room for that upgrade.
@fosiaudio well, it is not as simple as replacing the Opamps. But if you are handy with a soldering iron, you can do it yourself. The only problem I see is there is no room for those (Coilcraft or Wurth) inductors. The latest models from Fosi and Aiyima already come with very decent inductors(Sagami)
@@MiguelAngelVelazquez maybe in the future they can make that update and introduce those inductors you mention, along with a bigger casing. I don't have any soldering experience/ knowledge so i hope they come preinstaled.
Hey Zeos, can you please get hold of some copyright free music for your speaker / speaker amp reviews. It's painful to hear just a second of something only for it to cut off, repeatedly.
I would go with the Bt20A Pro + QAs. Unless you're equalising at source, the tone controls on the Pro will make a far bigger difference to your listening enjoyment than the slightly better SQ of the V3.
Thank you for such a quick answer. I have q acoustics 3050i 91 db sensitivity. I love your videos, you do a great job on UA-cam. My next purchase will be Swans m300mk2. Is the sweet spot of these speakers narrow? Because I want to buy them for the living room and I don't always sit in the middle.
The posi v3 and posi bt20a have different heat sink designs. Thus the v3 can pull a higher amp draw without heating up as much . I think, the v3 can sustain a higher output for a longer time. The v3 uses the aluminum body to dissipate heat. And the bt20a uses a conventional finned internal heat sink. I think v3 has a much better heat dissipation .
Hi, I just got mine. I am having problems with getting the headphones to work. Using the 3.5 jack, for some reason it just bypass the sound. Any advice would help. Thanks for your channel Zeos.
Would 2 of these with a pre-amp run my ohm walsh 2s? I want to get the beautiful sound out of my speakers that I know they can produce. Time for a change from my vintage marantz and Yamaha amplifier
So I bought the Fosi upgraded power supply already(bass-ackwards?). Will be getting this amp Z mentioned there was a coupon, anyone know of it? Thank you
you cant touch the tone controls on these texas instruments amps that have them when playing at very high volume. It clips badly. Its not bottoming out the rb42 its just a nasty hard clip from the amp. My a07 pro does this... it sounds terrible lol.
This is Class D and that maybe not so good, but you can play music very loud,but i have for many years ago two mono blocks at 600 watts per channel ice class D,that was very good.
This V3 togehter with the P3 and the K5Pro DAC will be one of the most interesting hifi setup for starters and users...find some nice speakers and you are ready for a long time.
Is anyone using the 32v 5a power supply that came with the A07 with their Fosi V3? It is definitely physically larger and fits. I'm doing it just for that reason but don't know if it is better or worse.
@@jean-claude307 I don't know. I did see a video where someone measure some of those supposedly better power supplies. They performance was really dissapointing in the measurements. The Fosi 48 was excellent in that same video doing the power measurements etc. I'm not a technical guy sorry!
V3 has better internal components. German Wima stuff and other stuff....to get technical. The BT20a and the V3 are definitely not identical in that regard. Same chip though for sure.
I have the second version of the Emotiva a-100 amp and I can verify that it powers 4ohm loads just fine, though the cooling could use bolstering. I have mine under a big fan so it's cooled a bit.
Comment #4 (for the algorithms): I remember when every vid I faved on YT would automatically be posted on my FB page. For some reason I thought it was important that all my FB friends saw every video I saw.
Nice shake down. I got one on order. 😊 so you don’t think the Japanese and German upgrade parts on the V3 make a difference over the BT 20 pro? Really?
Amazon purchase link-- amzn.to/3O5qfVf
Official purchase link---- bit.ly/fosiaudiov3
Aliexpress purchase link- www.aliexpress.com/item/1005005605031795.html
12$ off promo code: FAV3ZRS12
(works for all platforms)
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You can disable the bluetooth on the BT20a pro by holding in the volume knob.
Great tip... especially because no one reads the manual.
No, just reset the source
The real revolution is the Texas Instruments IC chips that these low cost high performance amplifiers are built around. Kudos to Fosi & Ayima in applying those chips, pioneering low cost & high performance amplifier products. Established companies (like Yamaha, etc.) need to do the same with their receivers, lowering cost & raising performance at the same time. Credit companies like Texas Instruments (❤ to Texas), who is continuing to design better class D amplifiers while keeping the cost low, charging just $6 per chip from Mauser electronics. We live in a new golden age of amplifiers.
And here I am with a closet full of big power amps of 200+wpc.
Thats fine.
Then you look at the snakeoil killing the industry with 10-20k amplifiers.
For the record, into 4 ohms the V3 has been measured at ~140W per channel with the 48v power supply. It's around 60W per channel with the stock PSU. Not that it matters unless you have a huge impedance spike in your speakers response
What was the frequency of the signal?
For how long did it measured that?
What was THD?
What was the impedance?
How many channels driven?
@mindtraveller100 Google sounds like your best option. Enjoy your specification homework 👍
@@mindtraveller100
frequency:1kHz
THD+N: -74dB
Impedance: 4 Ohm
2 channels driven
at 8 ohm you get 89W
42v or 48v?
@@ZReviews 48v, my bad. Original comment was a typo
I’ve been playing with the V3 for a while using the 48V 5A power supply and let me tell you, this thing really benefits from active cooling. When it gets warm the sound quality falls apart quite a bit. What I discovered is that a computer fan set at a low speed brings the case down to near ambient temps so it doesn’t take much but it’s really worth doing.
if your v3 is getting very hot i would recommend trying new thermal paste and adding some to the metal that touches the case in between the heatsink and case has none. i did this to mine when i swapped opamps to OPA1656. but my main point is im running the v3 with 48v 7.3a and was using it with a 48v 10a and never had a problem with heat at all, my dac gets more warm in the stack than the v3
do you have a link to the power supply that you are using? i dont really want to buy the fosi one.@@gamerman644
I have not noticed this at all and i get loud enough for me. 85 to 90db. Maybe you are even talking louder. I don't play thunderously loud metal music or anything though so maybe that is the difference. I do love good bass slam and this little amp delivers. Shocked actually!
Waiting for the day when Micca releases the RB-62...
Hello Z, hope your're doing great. What would be the best pairing for a DX3pro+...the Topping PA3s or the Fosi BTA20 Pro? Thanks!
Z, thanks for finally linking something to look at your homemade cable, been wondering what that was for WEEKS. That's how you run headphones off of any of your speaker amps??
I wanted to support you with your Amazon link Zeos but Amazon screwed me on delivering my BT20a Pro(to replace Topping MX3 powering RB42's from previous recommendations), so I ended up cancelling the order and order directly from Fosi for $115.99 with the 48V power supply vs $99.99 on Amazon with the 32V power supply.
I'd like to test if the variable power supply is changing anything itself. In other words test it with the bricks Fosi sells. And for speakers use Klipsch (high sensitivity) vs Micca RB42. I can tell you because I tried the speakers, the Miccas walk all over the Klipsch but you have to crank the volume knob to do it. With Miccas you really need the 48v brick, with Klipsch you don't. They both sound good depending on if you like the speakers sound signature. edit: wrote this before I saw the entire video
true2 expensive speaker vs headphone
i run two v3s from a schiit syn to get surround sound (two polk psw-10s, two polk es-30s , polk cs-10? for center and some polk blackstone for surrounds. my mains sparkos v3 amp has a 48v power supply and i do use a cheap beringer 9 band eq for tweaking. i gotta say every time i think i might replace it with something....when i dial it in, i get a fantastic sound and say, ok...im good. i get no hiss at all. for a small black metal box for 100 usd.....it really does deliver.
Just bought the V3 along with those $99 Jamo S803 yesterday. Probably way overkill, figure it'll handle beefier speakers when I upgrade down the road. Now considering swapping the V3 for the BT20a Pro for the tone controls.
those Jamo S803 will suprise you! i know i was blown away by them
I have both but prefer the V3. Z repeatedly said the V3 and BT20A Pro have the same internals, they do not. Looks up photos, the V3 has two massive caps the size of your thumbs, the BT20A Pro does not. Also see ASR measurements, both are better than the TB10D but the V3 is king and you can hear it. I’m a little surprised Z didn’t hear it.
When listening to both the V3 has better, flatter bass extension with a slightly cleaner, more delicate sound. The tone controls are pretty nice on the BT20A Pro but I’d still recommend the V3 over it if you can work on your room to minimize you need for EQ.
The BT has a really inconvenient Bluetooth implementation, it is very annoying to switch between inputs because as soon as the device is on it connects. Reset to unpair. Works fine in either mode, just not both regularly.
Awesome. Hope to see more these. This is the new trend of amplifiers. A comparison of Aiyima vs Fossi?
What affordable dac would you guys recommend for a 2.1 bedroom setup with this amp?
Smsl makes an adorable little unit. Su1?
anything with most details, you dont want to miss anything w these
Something tells me that your 48v silver power supply that you built is way better than the 48v power supply that they sell you for $50. Could be wrong but yours looks like a tank of engineering. I have the V3 and would be tempted to by the RB42's if that $50 48v power supply were actually really a good one. Anybody?
It’s good and literally doubles output. Definitely a good unit
@@christophedecavalla2941 Are you speaking of the Fosi 48V?
@@RUMBLEGO1 yes the 48v power supply.
Most popular amp? Not the V3. The A07 sold 1000 times more and they are both as good as their below $100 price (class D). Good but not great. The BasX is great (class A/B).
Thank you for the Aqua Teen Hunger Force flashback. I already bought a Fosi V3. Love that little amplifier.
If they made one that was a balanced mono block wow, that would be god like
Wow, that is a good idea!
@@fosiaudio DO IT!!
its the endless race, think ive given clear idea that one suits dap best
balanced style would just be a lowend ciems w senn price, not too appealing
It is August 2024 and there is a mono V3 with the 48 volt power supply which works with a pair of V3 Monos. $280 a pair!
British Audiophile said get one and I heard you mention it. So I got mine a couple weeks ago. It is SO clean. Best, D.
cleanest
Why is it so hard to find a budget amp like these with optical?
One thing that is important is that lab ppwer supply is no doubt better than the ppwer bricks they send with everything these days. One potential reason why it's more quiet. I have thought of getting a big lab ppwer supply in the past for diy projects or for powering other things. Most of them have great specs, they are cheap and so many brands as they have been making them for many years. Thanks for the entertainment !
That pass through is no more than a Y cable. Nothing you send into the RCA goes into the Amp to come out the 3.5. You can actually use the 3.5mm as an input as well.
I use the Fosi P1 as a preamp and it has tone controls. Good review
Ive been using these fosi amps to build those portable carry around box speaker systems. Makes an ass out of the turtle box that cost $400
I'm sold micca rb42 and the fosi v3 with the 48v power supply for the extra $50.. but I'd like to use my phone or my tablet as music source what you guys recommend? Something on the price range like this fosi would be awesome.. 😎
Since you were the one who turned me on to Micca RB42s, I have to tell you they sound awesome with a BT20a Pro. I had them with a Klipsch R-100sw but they didn't need it at all. I'm using the stock 32v power supply so I had to turn the volume up to 3/4 but it sounded awesome. I'm using Klipsch R-41ms until I upgrade the power supply (I want the Sparkos op amps too), but they need the sub and imho don't sound as good as the MIccas loud. edit: wrote this before I saw the entire video.
You need to turn the volume up to 3/4 becuase the BT20A PRO adopts a taper A potentiometer. It's more linear for human ears.
@@fosiaudio I was just trying to say I had to turn the knob farther with the Miccas than I do with the Klipsch to get the same sound levels. With the Klispch I don''t feel like i need the 48v power supply, but I do need the powered subwoofer. With the Micca RB42s I needed the 48v power supply but not the subwoofer. My plan is to do it all. RB42 plus 48v plus Sparkos op amp plus Klipsch subwoofer. Wiim mini to SMSL SU-1 for source.
They do sound great together. I bought that for my son when he moved into his new house. He loves the setup.
What happens if you run a pair of passive speakers and a subwoofer 150W without a preamp, (by only using the Fosi-Audio V3)? would it work?
Is the TB10D similar?
I ordered!I like it!
And you can change the opamps in it ☝️
The bass was weak on electronic music compared to my class AB amplifier. I just ordered the other 48v power supply. So far the mids are ok but bass is poor. I'll update.
Not knowing what your speakers are it could very well be the power supply
@@ZReviews JBL 4312 SE with 12 inch woofers. Might be still a tall order for these 90 DB 6 ohm speakers which are doing great with my Chord Anni @10 watts. Class AB. Have also ordered the Burson Audio time keepers monoblocks @30 watts pure Class A. So I will arrange a shootout soon!
Yay, I'm sooo glad you and Fosi got in touch for this as I tried to tell ya about it in email, lol. They had like 20 of their customers provide input on something next level. The swappable op amps are even better with Sparkos. The heatsink is now away from capacitors underneath the board and better airflow means less deterioration of the caps long term. Have you seen the guts inside? Top shelf... so happy my favorite reviewer got his hands on a product I feel a part of and thanks to Fosi for their listening and production of something so valuable for the price point. They even are now an authorized resales for Sparkos op amps since so many swap for them, so the future looks pretty interesting
I would not stretch too much and say the V3 components are Top Shelf, there is still room for improvement. Its Elna capacitors are the bottom of Elna audio grade capacitors. The Elna Silmic II, Those are top shelf, or Nichicon Muse UKZ or Fine Gold UFG.
But I get your point, the V3 uses better components than the competition and other Fosi amplifiers.
If you are handy at Soldering, you could replace those components yourself.
How about that! Rolling parts!
yeah they def worth auditioning
The amp using the 48 v power supply puts out 161 watts & headroom 191 watts reviewed by audioscience. The smsl a300 in bride mode put out 400 watts per channel.
Tank Girl Background! Woot!
Hard to Drive 4 ohm Speakers? Magnepans are kinda the go too for hard to drive speakers. Mid 90s Thiel speakers had a reputation for being hard to drive as well.
Can you do a side by side comparison to the infineon amps? I have the smsl da18 and curious about these for my t50rp mods.
Where can I get said 48v power supply. Also, can you use a subwoofer? TYIA
I linked it in the description
@@ZReviews Thanks Z!
At 9:52 I thought that was a filter lol. Surprisingly good as mellow Donald Duck impersonations go.
is it good idea to get this to power front L/R, so avr can C and surround? i have Klipsch synergy F2.
I actually might try that
This was my question as well
Put the rb42 passive radiators on the sides( mirror imaged, of course)
To turn on Bluetooth on the amplifier you need to press the volume control, and bluetooth will turn off
I think on the BT20 a, you can press the Volume knob in to disable the Bluetooth.
Will give it a shot
What is better for a 2.1 System, Fosi-Audio V3 or SMSL A300 ????
Fosi za3 or aiyima a70
Acoustat 1+1's would be a challenge for the V3!
that unexpected rage at the end, love it :D
The tweeters should be outside .That will reduce brightness l
There's no way it will do 300 watts per channel cleanly.
Where are the links to the things, Zeos? You forgot the links to the things!
There is more bad with the pass-through. Please test this yourself if you can.
First... The pass-through works both ways... You can input via the 3.5mm too. Then you would use the RCA as outputs. Just like the Aiyima A07. It is really only a Y cable. Not even a line out.
So here is the nail in the V3 coffin. I found out last night that the RCA and 3.5mm pass-through of the V3 are wired wrong and when another device is plugged into the V3, while conducting an isolated L-R stereo separation test, reveals the crossed signals. This error doesn't happen when you only use the RCA(or 3.5mm) input alone... But as soon as you plug something into the V3 for output... L-R tests reveal the cross-fed signals. When testing, the left channel will play and a reduced signal will play in the right channel too and vice versa. This should not happen. Fosi Audio obviously copied the original circuit layout of the Aiyima A07. The A07 also had this error in their first run... They did fix it... So they say...
For Shame Fosi! You will have to split your signal before your V3 and feed your secondary device that way. You cannot use the pass-through in the V3. The entire first run of this device is junk for anyone needing that pass-through to work as intended. Buyer Beware!
Review I been waiting for…cheers bro! Ordering one ☝️
On my Elac unifi 5.2's i had to nearly max the fosi. They sounded good but i don't like playing at 90% max volume on max gain from my pre, i like my headroom. My Aiyima A08 pro LOVES the 48v power supply and i'm running at about 33% less on the volume from the stock 32v PS.
You need to max the volume because it uses a taper A potentiometer, it is more linear for human ears.
To 100%?
ya class d make great headphone amps. fosi never sent one for testing. to bad I have a few design ideas >:)
I bought the hype, bought one of these V3 amps, and I think it is a piece of garbage. Weak power, crap sound. I thought it may be defective so I sent it back and bought a bt20a pro. Just as terrible.
🐐
@@iikatinggangsengii2471simp
just wondering, i was about to get a pair of speakers and im torn btw thos Micca RB42 (would get the BT20a) and the Edifier 1700BT, which one is better?
I have the 1700BT and dont really like them that much
I have the rb42 powered by the v3 and they leave the 1700bt for dead. Not even in the same league. Sound is balanced and you are better of with the better sound quality than tone controls.
Get a pair of Vandersteen 2C's.
I ordered the V3 through Amazon. Is that why I didn't receive the orange volume knob?
I think that might be the case
The orange knob is an add on. It doesn’t come with it stock
The internals and engineering of the v3 is the most diferential aspect vs other amps with the same chip. Haven't tried it, but the general opinion seems to be it has an overall better performance because of that.
Yes. The V3 is the first to offer a decent quality components: coupling capacitors and output filters inductors and capacitors. All these amplifiers have a very similar design. The difference lies on the components. Having said so, you can always upgrade your amplifier components to whatever you prefer.
The problem with the BT20a pro is Fosi failed on the coupling capacitors and on the output filter capacitors. But they did correct them on the V3. Unfortunately, there is no room for inductors upgrade like Wurth or Coilcraft (expensive ones) like the ones Topping used on the PA5. Those inductors make all the difference in the world. The A07 does have room for that upgrade.
@@MiguelAngelVelazquez Do you mean replace inductors by yourself like op amps?
@fosiaudio well, it is not as simple as replacing the Opamps. But if you are handy with a soldering iron, you can do it yourself. The only problem I see is there is no room for those (Coilcraft or Wurth) inductors.
The latest models from Fosi and Aiyima already come with very decent inductors(Sagami)
@@MiguelAngelVelazquez maybe in the future they can make that update and introduce those inductors you mention, along with a bigger casing. I don't have any soldering experience/ knowledge so i hope they come preinstaled.
@@fosiaudio maybe this could be a way to improve your next generation of amplifiers even further 😀
Where can a speaker cable and adaptor for running headphones be purchased that is made already? Thanks !
They make premades on AliExpress. I built mine
You get what you pay for. Using the 48V 5A power supply, it can be a fire hazard. Spend a little more and get the Sony STR-DH190 ( $149.00 @ BB).
Hey Zeos, can you please get hold of some copyright free music for your speaker / speaker amp reviews. It's painful to hear just a second of something only for it to cut off, repeatedly.
Thinking to power Q-acoustic 3020i with these.
I would go with the Bt20A Pro + QAs. Unless you're equalising at source, the tone controls on the Pro will make a far bigger difference to your listening enjoyment than the slightly better SQ of the V3.
Thank you for such a quick answer. I have q acoustics 3050i 91 db sensitivity. I love your videos, you do a great job on UA-cam. My next purchase will be Swans m300mk2. Is the sweet spot of these speakers narrow? Because I want to buy them for the living room and I don't always sit in the middle.
????????
You will be fine with Swans in even a large room. Enjoy and thanks!
@@ZReviews THX !!! 😀
The posi v3 and posi bt20a have different heat sink designs. Thus the v3 can pull a higher amp draw without heating up as much . I think, the v3 can sustain a higher output for a longer time. The v3 uses the aluminum body to dissipate heat. And the bt20a uses a conventional finned internal heat sink. I think v3 has a much better heat dissipation .
Hi, I just got mine. I am having problems with getting the headphones to work. Using the 3.5 jack, for some reason it just bypass the sound. Any advice would help. Thanks for your channel Zeos.
Would 2 of these with a pre-amp run my ohm walsh 2s? I want to get the beautiful sound out of my speakers that I know they can produce. Time for a change from my vintage marantz and Yamaha amplifier
So I bought the Fosi upgraded power supply already(bass-ackwards?). Will be getting this amp Z mentioned there was a coupon, anyone know of it? Thank you
I don't think you know what you're talking about. Especially when referring to power levels.
Keep in mind, that fossi v3 is best ran on a 48v 10 amp PSU! it will also run on 52v but at the risk of more heat (probably as much as +20% degrees)
Magnapan are 4 ohms
you cant touch the tone controls on these texas instruments amps that have them when playing at very high volume. It clips badly. Its not bottoming out the rb42 its just a nasty hard clip from the amp. My a07 pro does this... it sounds terrible lol.
Stupid camera.
Sounds wonderful paired with the Chane A1.5, and running from the Sound Blaster AE-9!
Run that much power through normal headphones, Voice coil's will melt killing your headphone's, Be careful people !
This is Class D and that maybe not so good, but you can play music very loud,but i have for many years ago two mono blocks at 600 watts per channel ice class D,that was very good.
This V3 togehter with the P3 and the K5Pro DAC will be one of the most interesting hifi setup for starters and users...find some nice speakers and you are ready for a long time.
Is anyone using the 32v 5a power supply that came with the A07 with their Fosi V3? It is definitely physically larger and fits. I'm doing it just for that reason but don't know if it is better or worse.
update....got the 48V 5A and without a doubt worth it for me!
@@RUMBLEGO1 Have a meanweel 48V 4.4 A Would it make a big difference with the 5A from Fosi ? Thanks
@@jean-claude307 I don't know. I did see a video where someone measure some of those supposedly better power supplies. They performance was really dissapointing in the measurements. The Fosi 48 was excellent in that same video doing the power measurements etc. I'm not a technical guy sorry!
Thanks. My choice is now made
@@RUMBLEGO1
V3 has better internal components. German Wima stuff and other stuff....to get technical. The BT20a and the V3 are definitely not identical in that regard. Same chip though for sure.
think its like max levelled assassin vs ranger in elder scrolls, well you get the idea
@@iikatinggangsengii2471 perfect comparison!
Think I need should get the 48v for something like the whaferdale 12.1? does it sound better
Maybe hook this up to some Ohm Walsh towers
I need a second or third or fourth so I could spread them out
I don't know if this was mentioned, but the BT20a Pro has an actual pre output. You can use an active Subwoofer and change the volume on the amp.
Can I use the Preamp of my Element III as input for the V3?
And if so, what do I have to mind if i want to connect my Tungsten to the v3?
Cool review! I keep thinking the girl on the screen is pudgy/fat = yuk.
wanted to get the swan d300 but not sure now thinking of smsl ao300 with Qacoustics 3030i any thoughts anyone?
Z, Could you link banana plugs that " actually " fit the V3. Best, D.
Cool test track for speakers: "Agelast" from Meat Beat Manifesto. Nice imaging and bass test. Something a little different. Cheers dude.
I have the second version of the Emotiva a-100 amp and I can verify that it powers 4ohm loads just fine, though the cooling could use bolstering. I have mine under a big fan so it's cooled a bit.
Can I pair it with Klipsch Bookshelves R 50M
please review Meyer Sound Amie active 900 watts monitors
but if i use it for klipsch rp600 or 6000 than wil it be better
if you have the option turn the bench powersupply to 10A 48v
ANyone else have any opnions on this vs anything new that has shown up?? looking to buy my 1st but wanna go as good as possible to start .
far out!i nver even heard of Westworld until i was forced to watch antenna t v the other day. what a foreshadowing movie for these times.
Sounds great at moderate volumes but lacks bottom end thumb of a good amp
Comment #4 (for the algorithms): I remember when every vid I faved on YT would automatically be posted on my FB page. For some reason I thought it was important that all my FB friends saw every video I saw.
I literally had set to tweet every time I set up a video. When they remove that feature I was very sad
Is there any actual limit how much a speaker can be built to move forwards and backwards?
Nice shake down. I got one on order. 😊 so you don’t think the Japanese and German upgrade parts on the V3 make a difference over the BT 20 pro? Really?
they are indeed more accurate, other one like a best ramen in store, but as said, more straightforward excellency
Planning on get one to power my Magnat transpuls 1000's
About min 30: that was the sound of woofers distorting (cone breakup). Z had maxed the bass, hmm? LOL! 😊
ciems, as said theyre best at accuracy, including frequency accuracy, bass amount included
Cam makes me nauseous.
Where's that stand from that you have the V3 on?
how did you connect the amplifier with the headphones?
How many watts to output max speaker connection