Running this unit through a Fender silverface champ (70's), Maxon od9 , Gibson sg and a telecaster. You can get a good overdriven sound. Be careful with the low and high controls. HIGH- anything past 9 o clock sounds horible. LOW- very interactive with the MID control. Turning up the low almost forces you to turn up the mid. I like to keep it around 8 o clock. Gain sounds good anywhere in the 7 to 2 o clock range. Pedal works best with one 12ax7 in it. also sounds good using the maxon od9 to push it a little harder.I gave it a high value rating because if you are looking for the 'BRITISH' sound it does it very well

I bought this box based on a EHX demo, thinking at the time that the overall tone and dirt coming out of it would be a nice addition to my petal board. As a distortion box, the Muff'n is pretty weak. All you'll get out it is a stock 60's sound, something akin to very early Cream. Where the box really shines is as a pre-amp/overdrive. It makes anything you put behind it sound better, cleaning it your signal and boosting it before it hits your amp. If you have a tube amp, it's like adding more tubes to your preamp section (2 more, to be exact) and thereby beefing things up a bit. For this purpose it's great, but as a stand alone dirt box, I'd probably look elsewhere.

Buy it you will love it. Seems well built, like a tank. Beastly overdrive. Sweet tones, It has it all, a nice addition to the Epiphone valve Jr.

I am a bass player, and bought this to use as a preamp to get some tube drive. I now use this all the time as a preamp, and love how it sounds. Been using it quite a lot without a hiccup. This also sounds good on guitar, and would be nice in front of say a Valve Jr, to get some extra drive and tone controls. I would replace this in a heartbeat! I love EHX

i got this pedal more thin a year ago and i have loved it since day one onyone can find there sound in this pedal.i got a little buzz with it but with some tweeking of my amp i got it under controll. it is a little price but if you have the money it is worth it great pedal