Having a technical conversation in a language that isn’t your natural language is hard. You did a great job, I very much enjoyed your analysis. Cheers!
25w before compression happens in the power amp means it can still go louder (obvious, I know), but yeah, I'd say this thing could hang with most gigging amps :) Thanks for all the work you put into making the video!
Hello Joey, I had already seen a video where someone did a review of the PRS MT15 and they said: "This amp is described as being a 15 watt amp and having 15 watts RMS but I have compared it to several other 15 watt heads and the PRS is much louder it must have 20 or 30 watts." but he did not explain it in technical terms. You should make more videos because you are able to explain the technical details. Cheers. Mike.
Hell yeah, im a physicist and its great to find such a good approach to that question, I think lots of people have, loud enough? now I can comfortably get the MT15. More analysis like that!
Been scoping all my amps’ output recently, all of them are exactly the output they claim to be. However my MT15, it was 48v output p2p and by my calculations is putting out 36 watts into 8 ohms! Pretty crazy.
I’ve always heard that this amp actually put out more power than it claimed. I appreciate you putting a video out showing that it indeed is actually more than they claim. I’m so curious why guitar players want these huge 100w amps when you can never use that unless you’re playing arena type venue’s. This amp is perfect for 90% of people. You did an amazing job. Thanks again man!🤘🏻
I had to dime my loud 100 Watt Carvin X100 212 combo to keep up with my hard hitting drummer. :D In a home setting or with a PA setup, completely agreed, though. I like what I'm hearing from these amps. 8)
Ive played guitar for around 8 years now and used to think the same thing, played a 100 watt 6505 for the first time last week... i get it. The power they produce is honestly adictive
Because in the 60's through early 80's PA tech sucked balls. Most of the time it was dedicated to vocals and drummer. Bass and guitar had to run massive amps in daisy chains to be heard.
Because of headroom, at the same volume, lower wattage will sound boxier and higher wattage will have bigger headroom (for example Bugera 6262 sounds much bigger than MT 15)
Dude, don’t even worry about your English skills. You are doing just fine! I know people who can barely speak English, and they are US citizens! Lol. But seriously, thanks for a really informative video. I bought this amp a month ago and I love it. Keep up the great videos!
Danke für den ausführlich erklärten Test! Habe deinen Kommentar bei Ola gelesen und musste gleich mal hier vorbeischauen ;) Habe selber einen MT 15 und bin begeistert von diesem Amp! Und damit keiner meckert das ganze noch in Englisch: Thanks for the well made and explained test! I've read your comment on Ola's channel and had to check immediately yours ;) I have myself a MT15 and simply love this amp!
Hey, das ist ja super. Danke fürs vorbei schauen. Und ja, der Mt15 ist grandios! ... und in Englisch: Hey, that's cool. Thanks for visiting. And yes, the Mt15 is amazing.
Great video, and to be fair you can speak more languages than I can and your English is better than most people that live near me! ....I live in the Uk xD
it's actually closer to 24-25 watts, also after an interview with the PRS amp tech, it's designed to be modified to a 50 watt amp with the change of the output transformer.
I just got this amp today from Thomann as a B-stock and it's fantastic. I have always played Fender amps and to say this amp is great is a big deal for me. Nice vid, Joey.
Thanks man! I have baught mine mostly because of the ton of tight gain it schuld deliver, and I was not disappointed ;). But what surprised me, was the very nice warm but sparkling sound of the clean channel. I've played the 2ch Rectifire befor and had never such a nice clean tone on it. So the MT15 is a small package full of suprices! 🎉
How do the cleans on the MT15 compare to Fender cleans? I know there different, but in what way? .. I've been playing a fender amp for years, but i'm considering this one.
I am considering pairing this with my OR15 due to the clean channel and a tight lead channel.. Do you find the cleans compare to a fenders cleans? Deciding between this and a princeton or deluxe reverb.
If we stop when it visibly start to distort we are at 18 volts peak, which are 12.73 Vrms, this gets us to 12.73^2/15 = 10.8 W I mean, they could have marketed this amp as a 20watt amp, but generally they'll consider the top when it starts to really distort. Some 100W amp can get well over 100W output when they are cranked up. Anyway good stuff, it's a brutal little beast this one :D
Plate voltage on my amp is 430V, bias is set at 25mv (=25ma) - 430 x.025 = 10,75 watts per side (tube) = 21,5 Watts at iddle ( a 50watt amp is usually set around 35 watts iddle)
Ja, mine is in the same ballpark. 10,75 W ist pretty low for a 6L6 GC, but not unusual. Peavey 6505 are sometimes lower biased than that und sound aggressiv and dinamic also in my opinion. And on your plate dissipation calculation we can see that the am musst deliver mor than 15W output power.
Interesting, and very cool! Makes me want to buy an oscilloscope! Lol I've always wanted one to test electrical stuff, and learn to troubleshoot electronics better. Thanks for the video!
Apparently the MT15 is just a simple mod away from being a full 50 watts, they had said that they just did something to choke it down to around 15, but easily reversible. That may be why it's louder.
Hey, do you know how much power those tube amps consume? Even this little amp gets so hot, it seems as if only a 100 W bulb would be inside that chassis, it wouldn't get as hot.
Hey, I would love to. I don't have one and I don't knew anyone around me that Owen's one. But if I have the chance to find a cheap used one, I will totally bui it and measure it for you all. I don't know if it has to be the "stealth" type. I think the power Amp section ist the same wit the normal type.
@@Fight4Madness yes I believe the Stealth has the same tubes as the LBX 1 and 2. One review video I watched the guy said the earlier ones are a bit louder but the Stealth gets dirtier. A lot of the sound difference depends on the cab, the EQ, the guitar used and in some cases the users extra effects/post processing, but the actual power output should be the same across the range. Thanks for the reply.
How can his 15 watt cost 700$ compared to a high gain mini joyo amp that has 20 watts, ? Is it cause of the control of tones to make it more dynamic or crisp tight distortion? Cause the joyo is retail at 169 , and sounds great and plenty loud !
Oh that's a God question. I'm not sure if the amp reacts in the same ratio in Triode power Amp mode. If I find the time i will ad a short Video wehre I measure the low power mode
Thx for the demo. Have you had any noise issues with the FX loop (especially with a digital reverb pedal)? Have you used a 4 cable method? Mine makes quite a lot noise.
Hey, no I had no noise problems with the FX-loop. Yes I had used the 4-cabel methode without having noise issues. But I've had a noise gate aktivater after the preamp. So I can not be 100% shure if the FX-Send is maybe noisy.
What's did you come up with 15 ohms? Also, what part of Germany do you live in? Ich bin eine U.S. Soldat von der kasserne Bamberg von 2008-2010 yahre. (Meine Deutsch ist über schlect)
Hey, thanks for the German words :) Im from northern Germany. Close to Hamburg City. What did you mean with the question "What`s did you come up with 15 ohms?" ...i think my english is not the best either. Did you want to know why i used 15 ohms?
Hey, do you mean max Gain at low volumes? Yes it does. When I play live I am using a cab with 2 x V30 Celestion. In smaller locations with medium volume it's brutal and tight. On an open stage outside without using a mic and monitoring the sound is getting a bit muddy and less articulated because I hafe to get over the sweat spot and at the edge of what is possible.
In my opinion it depends on the Cab you are using and the general volume of your band / Drummer. For example on a 1x12 cab with a Celestion V30 and an extreme loud drummer, you might drive the Amp in to Power Amp Compression and lose tightness. I played the Amp on 4-5 shows. Some on a 2x12 Cab and some on a 4x12. Both Cabs were loaded with Celestion V30s. Our drummer nows how to play his kit and is not a Caveman 😉. So in my case it worked fine I had headroom left on the Amp. One outdor gig on a small city festival I thaugt that I was lacking a bit controlled low end playing through the same 2x12 mentioned above. So it really depends on where you are playing, how you are used to play and how loud your bands normally plays I would say.
@@Fight4Madness wow man, thanks for the answer, normally we always have a PA system but in small clubs we sometimes have no room and we play through the cabs without amplification, our drummer is pretty loud but the sound of the PRS is almost perfect so i really want to buy it. i still have an extra marshall jcm 2000 if i really need to go really loud :)
@@cisseke94 You're welcome ✌️ Yep, the MT15 also suits my playing style so much. Ich can totally understand you! In this Club situations you discribe, I think you will be just fine with the output Volume most of the time. Important is that the speaker you are using have a high efficiency. I have compared a Celestion V30 with a Neodym Classic 12 Century just view weeks ago. Both speakers sounded nice, but the V30 is around 4 dB louder, which is like having more than twice of the power in your amp. So if your cab is very potent, you won't struggle at all.
Just received mine last week! Waiting for my FORTIN ZUUL and a MXR108S 10 Band EQ,to round it out! Will not fire it up until they come in. Thanks Again!!
side by side with bogner 3534 mesa markV 35 and the MT15 all about the same output, the MT15 had better bottom end than the MarkV35. And it simply wiped the floor with a marshall dsl20
Thank You for your time and efforts and through explanation because we all know that this seems to be very loud for it's size, and decriptive power rating. Now, isn't there 2 versions of this amp ? 1 with 6L6 and 1 with 5881 ? or is that just another name and they are basically the same Tube ? I have read that they are in fact different and will give different coloring of tone ? Hope that made sense. \m/
Thank you for your nice words! I don't know if they have changed the tube type during production, but a change from 6L6GC wich are installed in my MT15 to a set of 5881 would not make that major different in my opinion. The 5881 is the let's call it "little sister" from the 6L6GCs. It's mainly the same tube but with less power rating. A pair of 6L6GCs can achieve up to 60W in PushPull operation. A pair of 5881 can only reach nearly 50 W. But in the MT15 tat does not matter at all, because it is only reaching lower output power the both tubes can handle. In fact the first mesa boogie rectifier used the 5881 in stead of the 6L6GCs and some say this is one reason for the desired aggressiv sound from that early amplifires. I have both tube types here and Cann sy the the 5881 is minimal tighter in the low end and a bit more mid-present in my opinion. But compared to a change from 6L6GC to a pair of EL34, there is not much difference in Tone for me.
@@Fight4Madness Hey Thanks again for reply ! Yeah, I have the MT15 w the 5881's. Heard it was a better Tone. Sounded better in a comparison. I'm not very knowledge -able of Electronics Tech., and working on Luthier Basics and pickups ,Pot,Switch wiring. Want to go to Luthier School but far from home so IDK, but yeah, was thinking if possible to bias and switch to EL34, and if that would compliment tone, or and Gain or richness ? I'm good with it as present. I have several amps so this is kinda different and a missing link. Poor Mans Recto ? \m/
Great Video! Very interesting! Klasse Video, sehr schwierig, das in einer Fremdsprache rüberzubringen. Solltest du jemals den Ausgangsübertrager wechseln, bitte, bitte mach ein Video darüber! :-)
Hey man, since you know your electronics.... My MT15 has a problem with volume fading out and back in and treble doing the same fading (like pickups adjusted too low from strings). I've changed all tubes twice, except for the V6 Power Inverter tube. It seems to get better when I play longer, but there is just something off about it now. Would that possibly be a transformer issue? It isn't the tubes unless it is the V6 Power Inverter tube, because my volume and treble still fluctuated on two full tube set changes (except V6 tube). Could it be V6? I don't have a current balanced 12AX7 to throw in there to test. Would a regular 12AX7 work? Thanks for the help if you have any advice.
Hey Adam, at first I would try out chngeing for example V3 and V6. to try out if there is a problem with V6. V3 is only for the lead Channel. If you have a problem with the tube than the failure will jump to the V3 position and you will hear a fading of Gain in the lead Chanel instead of the Volume/treble fading. You can change the tubes against each other without any fear for the test (but only with the power cord unplugged while chngeing) . If the problem stays after the change of V3 with V6 and you can also hear it in the clean Channel like before, then we have to search further. Fading volume and treble can have several reasons. Like a blind pin on the circuit in combination with heat. Or a damaged Poti in combination with vibrations from playing guitar while standing on a Cab...
@@DC-uk9pg it’s got massive head room, and a little more volume control on the master. Just as loud on the bark, the distortion sounds a lot more clear and precise. I’d say it’s almost like I gave it a compression/reverb vibe too which is weird - like the faintest hint of both.
Hey, if you mean a Mesa Dual Rectifire Preeamp circuit, then no. The PRS Mt15 starts with the first to triodes of V1 in parallel and is using one triode more than the Recto's do for distortion. I have not checkt out the complete preamp circuit, but it's not similar to the rectifier I guess.
Hey Eduardo, no it would not. With tube amplifiers the output voltage has to be transformed via a Output transformer. The output impedance has to match the internal impedance via the transformer winding ratio. The most tube amp output transformers have 2-3 different taps wehre you can connect 4, 8 or 16 ohms. If you would connect an 8 ohm load to the 16 ohm output wehre I measured the output power, you'd in theory mathematicaly get more output power. But in this case the power transformer would limitate the max power, because the internal impedance won't match over the winding ratio with the speakerload. The max current that can flow through the primary winding would get to high and saturate the output transformer. If the transformer is not getting damaged then may by you would get a few watts more, but I would not try this at all because it is a dissmatch in the Impedance.
@@Fight4Madness thank you man, finally someone who explains it Cristal clear. In any case if I connect it the good way, 8ohm head with 8ohm cab it would develop the same power you were talking in the video?
@@ECF.05 Yes, exactly! The winding ratio on the 8 ohm output results in the same output power when connected to an eight ohm load as the 16 ohm output acts on an 16 ohm load. There will be a lower output voltage an the 8 ohm load, but bacaus of the lower impadance there will flew more current which results in the end in the same power in the load or speaker.
How do you think this amp would do in a rehearsal situation with a second guitarist rocking a 100w tube head? Can it get loud enough while sounding good?
If the other guitarist is well fitted in to the spectrum of the band and not turning everything on his Amp to 11 than it's fine. My band member guitarist plays a Peavy XXX (that's a 120W Tubehead) but he knows how to use it and when we play everything depends on getting a fat and well diffentiated sound where nobody is to loud. The drummset volume sets the volume and we build the sound and volumes of the other instruments around the drumms. In this situations the PRS MT15 has enough headroom to sound good and does not have to fear the 120W Peavey Amp at all. But thats just me and my band, if your band member plays a Marshall plexi and is rocking the he'll out of it to get a good powerstage saturation than you might have no chance.
I buy this amp after viewing people on UA-cam.and to my black face fender twin it's nothing more than a cheep toy. Do not listen to these UA-cam scammers.they use UA-cam to make money they not honest
I believe you. When you compare the build quality, and the clean tone quality of the MT15 with one of the best Amps ever build, the MT15 is a toy. The PRS is a typical moden mass product made in China. If it will last very long during road live is also a question. But in my opinion, the amp is delivering one of the best modern metal crunch / Lead tones that you can get in a tube amp under 1000€\$ and it is small and light wight and still loud enough for club gig situations in my opinion. It is perfectly matching the mini amp hype nowadays. In my opinion it does better compared to some other amps like the DSL20HR or the Ironhart15. To seperate me from the endorsed or payed UA-camrs - I did never get enny money or stuff or anything else for doing anny of my videos. In my case it's only curiousity what drives me :). I very much dislike scripted advertisement or something like this. You made a good point here. Never buld up your opinion on a sound of a musical instruments / gear, only by hearing it over produced sotial media channels. It's always different when you try it out with your one ears and in a environment that you know.
Real valve amps get better as U turn them up. But these PRS mt15 only get a little louder.there nothing more than a toy. U pay like $1400 then $300 for a reverb then $1000 for a 2x12 speaker box do the math. Total Chinese junk
I can't have an other opinion about the MT15, but it's only mine. Every amp has to fitt the players needs. If it does not, it's not your amp. I can't confirm that the Amp is Chinese junk. It's a typical modern mass product manufactured in China, but I have seen a lot of lower build quality products from there in same price range. It's a well layouted one PCB ciruit, nothing boutique, nothing crappy.
This is like this dudes 3rd hateful comment on this amp...If anybody sounds like a paid advertisement it's you for the amount of hate you've thrown at this amp. I'd absolutely put this amp against ANY amp in its size bracket and even against some 50w amps....Why spend thousands when this $700 head will blow the doors off the rest
Having a technical conversation in a language that isn’t your natural language is hard. You did a great job, I very much enjoyed your analysis. Cheers!
Thanks a lot!
THANKS for the engineering lesson. I had forgotten how to do the math from the measurement on a scope.
Haha, thanks from me too, now I have one more reason to get this amp once I save enough for it
25w before compression happens in the power amp means it can still go louder (obvious, I know), but yeah, I'd say this thing could hang with most gigging amps :) Thanks for all the work you put into making the video!
I have this amp and it's amazing. Yes its loud but very dynamic and does everything!
Thank you for this video, really nice to see actual numbers, good job man! I do own this amp and I really enjoy it.
Hello Joey, I had already seen a video where someone did a review of the PRS MT15 and they said: "This amp is described as being a 15 watt amp and having 15 watts RMS but I have compared it to several other 15 watt heads and the PRS is much louder it must have 20 or 30 watts." but he did not explain it in technical terms. You should make more videos because you are able to explain the technical details. Cheers. Mike.
Thanks man! Yah, I'm looking forward to do that, when ever I get the chance to caeck out a nice Amp.
I own two of these heads. Hooked them up to check output voltage. Stock they run at 32 watts. So, technically it should be called the MT-30.
intro riff was badass...love this amp
Wow...more value for my money...I knew it! And the sound is amazing too...lol! Thanks!
Hell yeah, im a physicist and its great to find such a good approach to that question, I think lots of people have, loud enough? now I can comfortably get the MT15. More analysis like that!
Been scoping all my amps’ output recently, all of them are exactly the output they claim to be. However my MT15, it was 48v output p2p and by my calculations is putting out 36 watts into 8 ohms! Pretty crazy.
I’ve always heard that this amp actually put out more power than it claimed. I appreciate you putting a video out showing that it indeed is actually more than they claim. I’m so curious why guitar players want these huge 100w amps when you can never use that unless you’re playing arena type venue’s. This amp is perfect for 90% of people. You did an amazing job. Thanks again man!🤘🏻
I had to dime my loud 100 Watt Carvin X100 212 combo to keep up with my hard hitting drummer. :D In a home setting or with a PA setup, completely agreed, though. I like what I'm hearing from these amps. 8)
Ive played guitar for around 8 years now and used to think the same thing, played a 100 watt 6505 for the first time last week... i get it. The power they produce is honestly adictive
Because in the 60's through early 80's PA tech sucked balls. Most of the time it was dedicated to vocals and drummer. Bass and guitar had to run massive amps in daisy chains to be heard.
Because of headroom, at the same volume, lower wattage will sound boxier and higher wattage will have bigger headroom (for example Bugera 6262 sounds much bigger than MT 15)
Dude, don’t even worry about your English skills. You are doing just fine! I know people who can barely speak English, and they are US citizens! Lol. But seriously, thanks for a really informative video. I bought this amp a month ago and I love it. Keep up the great videos!
Danke für den ausführlich erklärten Test! Habe deinen Kommentar bei Ola gelesen und musste gleich mal hier vorbeischauen ;)
Habe selber einen MT 15 und bin begeistert von diesem Amp!
Und damit keiner meckert das ganze noch in Englisch:
Thanks for the well made and explained test! I've read your comment on Ola's channel and had to check immediately yours ;)
I have myself a MT15 and simply love this amp!
Hey, das ist ja super. Danke fürs vorbei schauen. Und ja, der Mt15 ist grandios!
... und in Englisch:
Hey, that's cool. Thanks for visiting.
And yes, the Mt15 is amazing.
спасибо за видео . были сомнения ,но теперь точно я куплю этот усилитель благодаря твоему видео. prs должна вам платить )
Great video, and to be fair you can speak more languages than I can and your English is better than most people that live near me! ....I live in the Uk xD
the most german video i watched today
😅✌️
You deserve more subscribers dude. Great stuff!
Thanks man!
it's actually closer to 24-25 watts, also after an interview with the PRS amp tech, it's designed to be modified to a 50 watt amp with the change of the output transformer.
I just got this amp today from Thomann as a B-stock and it's fantastic. I have always played Fender amps and to say this amp is great is a big deal for me. Nice vid, Joey.
Thanks man! I have baught mine mostly because of the ton of tight gain it schuld deliver, and I was not disappointed ;). But what surprised me, was the very nice warm but sparkling sound of the clean channel. I've played the 2ch Rectifire befor and had never such a nice clean tone on it. So the MT15 is a small package full of suprices! 🎉
How do the cleans on the MT15 compare to Fender cleans? I know there different, but in what way? .. I've been playing a fender amp for years, but i'm considering this one.
I am considering pairing this with my OR15 due to the clean channel and a tight lead channel.. Do you find the cleans compare to a fenders cleans? Deciding between this and a princeton or deluxe reverb.
This guy is a metal engineer
If we stop when it visibly start to distort we are at 18 volts peak, which are 12.73 Vrms, this gets us to 12.73^2/15 = 10.8 W
I mean, they could have marketed this amp as a 20watt amp, but generally they'll consider the top when it starts to really distort. Some 100W amp can get well over 100W output when they are cranked up.
Anyway good stuff, it's a brutal little beast this one :D
All ratings are rated at a listenable distortion rating or a “useable” distortion. All amps. Stereos, tv’s, guitar, home audio equipment.
Plate voltage on my amp is 430V, bias is set at 25mv (=25ma) - 430 x.025 = 10,75 watts per side (tube) = 21,5 Watts at iddle ( a 50watt amp is usually set around 35 watts iddle)
Ja, mine is in the same ballpark. 10,75 W ist pretty low for a 6L6 GC, but not unusual. Peavey 6505 are sometimes lower biased than that und sound aggressiv and dinamic also in my opinion. And on your plate dissipation calculation we can see that the am musst deliver mor than 15W output power.
It's basically a 50w amp with a smaller transformer and the plate voltage dialed way down. Still damn loud though. I use a load box
Very interesting. Cool video and thanks for sharing the info!
Interesting, and very cool! Makes me want to buy an oscilloscope! Lol I've always wanted one to test electrical stuff, and learn to troubleshoot electronics better. Thanks for the video!
Great video. What about the newer ones with the 5881 power tubes? I imagine that the output wattage would be a little lower.
Very nice job.
tolles video 👍. genialer amp...freue mich schon auf die 100w version. mark tremonti behauptet er wäre bald marktreif! das wird eine boogie-killer😊
Subscribed. Please make videos forever.
Apparently the MT15 is just a simple mod away from being a full 50 watts, they had said that they just did something to choke it down to around 15, but easily reversible. That may be why it's louder.
Badass work man!
Does anyone know why they changed the tubes to 5881 on these amps?
It's the same thing as a 6L6GB but ruggedized for military applications. They just figured we were going to war with it ;)
Also the 6L6GC is a 30W tube while the GB from which is derived the 5881 is 23W which makes more sense in a "low" power amplifier.
Tremonti said in an interview that they switched bc the factory they got their 6L6s from 'burned down'
2:56 hahaha love the way you say that with the german accent
Hey, do you know how much power those tube amps consume? Even this little amp gets so hot, it seems as if only a 100 W bulb would be inside that chassis, it wouldn't get as hot.
Great video!
can you also measure the low power setting like you did with the Victory?
Oh, yes of course. This would be a nice addition. Mayby I find time on the next weekend 🤔
@@Fight4Madness Awesome.
Here it is: ua-cam.com/video/KIq6BW6cIPo/v-deo.html - Have fun watching!
Can you do this on the EVH 5150 LBX Stealth? I’m tossing up between these 2 amps.
Hey, I would love to. I don't have one and I don't knew anyone around me that Owen's one. But if I have the chance to find a cheap used one, I will totally bui it and measure it for you all. I don't know if it has to be the "stealth" type. I think the power Amp section ist the same wit the normal type.
@@Fight4Madness yes I believe the Stealth has the same tubes as the LBX 1 and 2. One review video I watched the guy said the earlier ones are a bit louder but the Stealth gets dirtier. A lot of the sound difference depends on the cab, the EQ, the guitar used and in some cases the users extra effects/post processing, but the actual power output should be the same across the range. Thanks for the reply.
How can his 15 watt cost 700$ compared to a high gain mini joyo amp that has 20 watts, ? Is it cause of the control of tones to make it more dynamic or crisp tight distortion? Cause the joyo is retail at 169 , and sounds great and plenty loud !
So would it be roughly 12W at the 7W setting? Or does it not scale that way?
Oh that's a God question. I'm not sure if the amp reacts in the same ratio in Triode power Amp mode. If I find the time i will ad a short Video wehre I measure the low power mode
Sounds like a SLO30 from what I've listened to via UA-cam
Thx for the demo. Have you had any noise issues with the FX loop (especially with a digital reverb pedal)? Have you used a 4 cable method? Mine makes quite a lot noise.
Hey, no I had no noise problems with the FX-loop. Yes I had used the 4-cabel methode without having noise issues.
But I've had a noise gate aktivater after the preamp. So I can not be 100% shure if the FX-Send is maybe noisy.
Rock n Roll baby yeeaaaahh.
What's did you come up with 15 ohms?
Also, what part of Germany do you live in?
Ich bin eine U.S. Soldat von der kasserne Bamberg von 2008-2010 yahre.
(Meine Deutsch ist über schlect)
Hey, thanks for the German words :)
Im from northern Germany. Close to Hamburg City.
What did you mean with the question "What`s did you come up with 15 ohms?" ...i think my english is not the best either.
Did you want to know why i used 15 ohms?
Fight4Madness your English is good, I don’t understand his question either.
Thanks!
Came here from Ola's video. Gj and thanks for the insight. I was wondering how it handled lowering volume on top of gain. Does it clean up?
Hey, do you mean max Gain at low volumes? Yes it does. When I play live I am using a cab with 2 x V30 Celestion. In smaller locations with medium volume it's brutal and tight. On an open stage outside without using a mic and monitoring the sound is getting a bit muddy and less articulated because I hafe to get over the sweat spot and at the edge of what is possible.
@@Fight4Madness thanks! Planning to buy this amp next summer.
hey, i want to order this amp, is it suitable to play gigs with no PA? can i use this amp in a club without extra amplification?
In my opinion it depends on the Cab you are using and the general volume of your band / Drummer.
For example on a 1x12 cab with a Celestion V30 and an extreme loud drummer, you might drive the Amp in to Power Amp Compression and lose tightness.
I played the Amp on 4-5 shows. Some on a 2x12 Cab and some on a 4x12. Both Cabs were loaded with Celestion V30s. Our drummer nows how to play his kit and is not a Caveman 😉. So in my case it worked fine I had headroom left on the Amp.
One outdor gig on a small city festival I thaugt that I was lacking a bit controlled low end playing through the same 2x12 mentioned above. So it really depends on where you are playing, how you are used to play and how loud your bands normally plays I would say.
@@Fight4Madness wow man, thanks for the answer, normally we always have a PA system but in small clubs we sometimes have no room and we play through the cabs without amplification, our drummer is pretty loud but the sound of the PRS is almost perfect so i really want to buy it. i still have an extra marshall jcm 2000 if i really need to go really loud :)
@@cisseke94 You're welcome ✌️
Yep, the MT15 also suits my playing style so much. Ich can totally understand you!
In this Club situations you discribe, I think you will be just fine with the output Volume most of the time. Important is that the speaker you are using have a high efficiency. I have compared a Celestion V30 with a Neodym Classic 12 Century just view weeks ago. Both speakers sounded nice, but the V30 is around 4 dB louder, which is like having more than twice of the power in your amp. So if your cab is very potent, you won't struggle at all.
@@Fight4Madness i was thinking to just keep my marshall 1960A, or is that not so good? :)
@@cisseke94 that's totally working. With a 4x12 I don't have any doubt that you will have enough volume!
Thanks!!
You're welcome!
Just received mine last week! Waiting for my FORTIN ZUUL and a MXR108S 10 Band EQ,to round it out! Will not fire it up until they come in.
Thanks Again!!
Great vid.
side by side with bogner 3534 mesa markV 35 and the MT15 all about the same output, the MT15 had better bottom end than the MarkV35.
And it simply wiped the floor with a marshall dsl20
Your English is fine. Keep it up.
Thank You for your time and efforts and through explanation because we all know that this seems to be very loud for it's size, and decriptive power rating. Now, isn't there 2 versions of this amp ? 1 with 6L6 and 1 with 5881 ? or is that just another name and they are basically the same Tube ? I have read that they are in fact different and will give different coloring of tone ? Hope that made sense. \m/
Thank you for your nice words!
I don't know if they have changed the tube type during production, but a change from 6L6GC wich are installed in my MT15 to a set of 5881 would not make that major different in my opinion. The 5881 is the let's call it "little sister" from the 6L6GCs. It's mainly the same tube but with less power rating. A pair of 6L6GCs can achieve up to 60W in PushPull operation. A pair of 5881 can only reach nearly 50 W.
But in the MT15 tat does not matter at all, because it is only reaching lower output power the both tubes can handle.
In fact the first mesa boogie rectifier used the 5881 in stead of the 6L6GCs and some say this is one reason for the desired aggressiv sound from that early amplifires.
I have both tube types here and Cann sy the the 5881 is minimal tighter in the low end and a bit more mid-present in my opinion. But compared to a change from 6L6GC to a pair of EL34, there is not much difference in Tone for me.
@@Fight4Madness Hey Thanks again for reply ! Yeah, I have the MT15 w the 5881's. Heard it was a better Tone. Sounded better in a comparison. I'm not very knowledge -able of Electronics Tech., and working on Luthier Basics and pickups ,Pot,Switch wiring. Want to go to Luthier School but far from home so IDK, but yeah, was thinking if possible to bias and switch to EL34, and if that would compliment tone, or and Gain or richness ? I'm good with it as present. I have several amps so this is kinda different and a missing link. Poor Mans Recto ? \m/
Great Video! Very interesting!
Klasse Video, sehr schwierig, das in einer Fremdsprache rüberzubringen. Solltest du jemals den Ausgangsübertrager wechseln, bitte, bitte mach ein Video darüber! :-)
Hey man, since you know your electronics....
My MT15 has a problem with volume fading out and back in and treble doing the same fading (like pickups adjusted too low from strings). I've changed all tubes twice, except for the V6 Power Inverter tube. It seems to get better when I play longer, but there is just something off about it now. Would that possibly be a transformer issue? It isn't the tubes unless it is the V6 Power Inverter tube, because my volume and treble still fluctuated on two full tube set changes (except V6 tube). Could it be V6? I don't have a current balanced 12AX7 to throw in there to test. Would a regular 12AX7 work? Thanks for the help if you have any advice.
Hey Adam, at first I would try out chngeing for example V3 and V6. to try out if there is a problem with V6. V3 is only for the lead Channel. If you have a problem with the tube than the failure will jump to the V3 position and you will hear a fading of Gain in the lead Chanel instead of the Volume/treble fading. You can change the tubes against each other without any fear for the test (but only with the power cord unplugged while chngeing) . If the problem stays after the change of V3 with V6 and you can also hear it in the clean Channel like before, then we have to search further. Fading volume and treble can have several reasons. Like a blind pin on the circuit in combination with heat. Or a damaged Poti in combination with vibrations from playing guitar while standing on a Cab...
It's not the tubes, it's cracked and broken solder joints and tracks, the only bummer to PCB board amps.
Developer said he can make it 55 watts in 30 minutes
Already have. It was $75 for the 50watt Mercury transformer, and $150 for the job and bias.
@@illuddivinus3309 Yeah that's really the difference right there, a larger transformer.
@@illuddivinus3309 I just got one, did you get it done at a local guitar shop? How does it compare from before?
@@DC-uk9pg it’s got massive head room, and a little more volume control on the master. Just as loud on the bark, the distortion sounds a lot more clear and precise. I’d say it’s almost like I gave it a compression/reverb vibe too which is weird - like the faintest hint of both.
@@DC-uk9pg call a local guitar amp modification shop. DO NOT SHIP YOUR AMP. I was lucky enough to have a local amp builder work on mine.
Same thing with the EVH 5150 lbx
is this a rectifier circuit ?
Hey, if you mean a Mesa Dual Rectifire Preeamp circuit, then no. The PRS Mt15 starts with the first to triodes of V1 in parallel and is using one triode more than the Recto's do for distortion. I have not checkt out the complete preamp circuit, but it's not similar to the rectifier I guess.
With an 8ohm cab would it develop more power??
Hey Eduardo, no it would not. With tube amplifiers the output voltage has to be transformed via a Output transformer. The output impedance has to match the internal impedance via the transformer winding ratio. The most tube amp output transformers have 2-3 different taps wehre you can connect 4, 8 or 16 ohms.
If you would connect an 8 ohm load to the 16 ohm output wehre I measured the output power, you'd in theory mathematicaly get more output power. But in this case the power transformer would limitate the max power, because the internal impedance won't match over the winding ratio with the speakerload. The max current that can flow through the primary winding would get to high and saturate the output transformer.
If the transformer is not getting damaged then may by you would get a few watts more, but I would not try this at all because it is a dissmatch in the Impedance.
@@Fight4Madness thank you man, finally someone who explains it Cristal clear. In any case if I connect it the good way, 8ohm head with 8ohm cab it would develop the same power you were talking in the video?
@@ECF.05 Yes, exactly! The winding ratio on the 8 ohm output results in the same output power when connected to an eight ohm load as the 16 ohm output acts on an 16 ohm load.
There will be a lower output voltage an the 8 ohm load, but bacaus of the lower impadance there will flew more current which results in the end in the same power in the load or speaker.
Interesting! :)
How do you think this amp would do in a rehearsal situation with a second guitarist rocking a 100w tube head? Can it get loud enough while sounding good?
If the other guitarist is well fitted in to the spectrum of the band and not turning everything on his Amp to 11 than it's fine. My band member guitarist plays a Peavy XXX (that's a 120W Tubehead) but he knows how to use it and when we play everything depends on getting a fat and well diffentiated sound where nobody is to loud. The drummset volume sets the volume and we build the sound and volumes of the other instruments around the drumms. In this situations the PRS MT15 has enough headroom to sound good and does not have to fear the 120W Peavey Amp at all. But thats just me and my band, if your band member plays a Marshall plexi and is rocking the he'll out of it to get a good powerstage saturation than you might have no chance.
Fight4Madness he has a Mesa Boogie Mark 3. Mostly bass & treble to my ears. I usually aim for a thick mid-heavy el34 tone with my H&K Switchblade 100w
The designer originally designed it to be a 50w
I failed Algebra miserably. wish they had a 30-40 watt version, or even 50 watt.
It was built for 50w. About $200, and 30-45 minutes, and the beast is unleashed.
10 extra?!?! That's watts up 🤣
Now see, I hate myself for loving this joke you made. Happy now? lol
So basically, it's loud.
I own a black face fender twin. And believe what I say .these amps are nothing more than a child's toy
These UA-cam scammers record this like 10 stack mashall amps.
It´s because of taxes
I buy this amp after viewing people on UA-cam.and to my black face fender twin it's nothing more than a cheep toy. Do not listen to these UA-cam scammers.they use UA-cam to make money they not honest
I believe you. When you compare the build quality, and the clean tone quality of the MT15 with one of the best Amps ever build, the MT15 is a toy. The PRS is a typical moden mass product made in China. If it will last very long during road live is also a question.
But in my opinion, the amp is delivering one of the best modern metal crunch / Lead tones that you can get in a tube amp under 1000€\$ and it is small and light wight and still loud enough for club gig situations in my opinion. It is perfectly matching the mini amp hype nowadays. In my opinion it does better compared to some other amps like the DSL20HR or the Ironhart15.
To seperate me from the endorsed or payed UA-camrs - I did never get enny money or stuff or anything else for doing anny of my videos. In my case it's only curiousity what drives me :).
I very much dislike scripted advertisement or something like this.
You made a good point here. Never buld up your opinion on a sound of a musical instruments / gear, only by hearing it over produced sotial media channels. It's always different when you try it out with your one ears and in a environment that you know.
You must be a fender employee cause this amp is fkn killer
Real valve amps get better as U turn them up. But these PRS mt15 only get a little louder.there nothing more than a toy. U pay like $1400 then $300 for a reverb then $1000 for a 2x12 speaker box do the math. Total Chinese junk
I can't have an other opinion about the MT15, but it's only mine. Every amp has to fitt the players needs. If it does not, it's not your amp. I can't confirm that the Amp is Chinese junk. It's a typical modern mass product manufactured in China, but I have seen a lot of lower build quality products from there in same price range. It's a well layouted one PCB ciruit, nothing boutique, nothing crappy.
toxic comment.
This is like this dudes 3rd hateful comment on this amp...If anybody sounds like a paid advertisement it's you for the amount of hate you've thrown at this amp. I'd absolutely put this amp against ANY amp in its size bracket and even against some 50w amps....Why spend thousands when this $700 head will blow the doors off the rest