Alright guys - this is just unbelievable!!! Y'all know I'd be the first person to knock a company for hype and "voodoo". Back in September, I had a Winfield amps build me a very custom built high-gain 5-watt, 1x12 screamer. The amp sounder great - especially at "11", but at below half volume/gain, it became a little anemic. I figured this was the nature of the best, and considered hell....it's 5 watts - that' what you get with 5-watts. HOW WRONG I WAS. I wanted more bass response, and more balls at lower volumes so I considered getting a bigger cab built as well as getting a new speaker.My close friend and amp tech Billy Carruth recommended putting a Mercury Magnetics Output Transformer in there. Those babies are pricey!! Well after hemming and hawing, I did it. I cannot tell you the DRASTIC difference this mod made!!! The amp now is untouchable!!! At any volume, at any gain!! Did it CHANGE the tone of the amp? No and yes! It kept the good and just TRANSFORMED IT to the most ballsy amp I've ever played, with any guitar, any pickups! Now this is not an ad for MM's - just I can't believe the difference an OT could make. d.