PRS MT 15 Amp

Of all the lunchbox amps I have seen, the MT15 just has exactly what I need on the tone department - crystal clear cleans and thick saturated high gain. Also the fact that it has 2 6l6 power tubes makes it sound like a full sized amp (they have changed the power tube to 5881 now and Tremonti said it actually made it sound better in an interview). I got this in 2020 (when it had 6l6) and writing this review now because we all have a honeymoon period with our gears where everything is a solid ten when it's new.

Tone-wise, it's all I need - good cleans and thick leads. I won't even complain it does not have reverb or any other bells and whistles like other amps in it's price range are offering because it's tone justified the price. It's a straight forward amp and you can always get a good tone with a few turns on the knobs.

Regarding build-quality there are a few issues:
The fx loop is a bit noisy, courtesy of high gain pre amp tube (12AX7) on the fx loop circuit. The remedy is to change the preamp tube of the fx loop to a lower gain tube like 12AU7 but I can live without changing it.

The master volume taper is not linear but a sudden jump at around 8 O'clock.

And lastly, my unit had a buzzy chassis. The base is a metal plate screw to the body and it can rattle at higher volumes. However, it's an easy fix by stuffing foam underneath.

Other than these three issues, I have absolutely no reason not to love this amp. It gives good tones, handles pedal like a champ, and achieve bedroom level volume without sounding too thin.

I have a 4 cable configuration gig for different guitars and effects, and this amp has given me the satisfaction of being able to keep every as in playing live at a very confortable size.
After playing with the amp for a long while, I found it very versatile and sound is great!

Keep in mind that preamp tubes are 100% 12ax7 (1 for global input, 1 for clean gain, 2 for lead, 1 effects loop) and getting a low volume lead channel is very tricky; but sounds great!
You might want to change global input (AKA v1 tube) to a lower gain tube (12ay7-70%, 12at7-60%) if you are looking for a broader headroom. But lead channel pair of tubes will blast you out to rock-land like a charm.

Your won't be disappointed with the power tubes section (1 12ax7 inverter and 2 6L6WGC). Sound is awesome and can even use different pre-amp pedals (I recomend "Diezel VH4-2 pedal" if require extreme rock-power) directly into power stage by the effects loop return.

Response is very subtle to changes from the knobs, thou I wish the clean channel had separate gain & volume controls, just like the lead channel.

Being able to switch from 15 to 7 watts is best thing that could ever happen to you. If you would like to keep it lower with the same pre-amp response, I suggest a "JHS Pedals Little Black Amp" as the last item in your effects loop chain.

Minor noise is present, do to the compact size of the actual components inside de amp... but that's is expected when you have such a beast enclosed in a "lunch box".

Keep on Rocking In The Free World!