Ive played a few Two Rocks in the past and while all were impressive amps only one ever really flipped my wig and was clearly my favorite of the bunch. It was the Emerald Pro. I didnt have a chance to spend a lot of time with that amp since it didnt belong to me but I had enough time on it to know I REALLY liked it. Finally, after a couple years of watching for them casually and spending a lot of energy and time exploring other areas, I came across a deal on one at the same time that I had some liquidity so I jumped on her. Now after a few weeks with my Emerald Pro I am more flat out blown away by this amp then ever before. Now that Ive had time to thoroughly explore my Em Pro with various guitars, cabinets, speakers and settings not only have I solidified my belief that this IS the best Two Rock built to date (for my needs anyway) it has impressed me far beyond my fondest memory of it. Few amps I have ever played have produced so much girth, dynamic and incredible cleans all in one package and none have ever done ALL so well. When I am playing this amp I find myself in disbelief that it is only running two 7581As at 50 watts. Not because of volume, but because of the girth and depth of tone. As a matter of fact Ive been extremely impressed with just how good this amp can sound at reasonable volume levels. I have never been a big fan of the 6L6 line of tubes for my needs due to the lack of midrange but the Em Pro produces big, thick, barking, girthy (I know, that word again, but I cant think of any other way to describe it!) midrange beef with the extended bass and treble of the 6L6. What tone!! Extremely full and rich across the entire frequency range. Absolutely no flub, looseness or loss of definition in the bottom end or anywhere else with this amp even with a Les Paul, humbucking pickups and first position string blending or chording. With most amps Ive played over the years I have had clear favorites as to which guitars sound good with certain amps. But with the Em Pro I have been equally impressed with every guitar Ive plugged in. It works as well with a Les Paul as it does with a Strat or any variation there of. With single coils cleans are deep, lush and glistening. Like a pool of cool, clear, swirling water that has depth that appears to go on indefinitely. With humbuckers you can get anything from barely on the edge of break up jazz tone to full on raw rock tones. This baby can even get surprisingly British if so desired. When I heard Tags Van Halen clips using his Emerald Pro I thought, he has to be using a pedal to get that level of aggression. Well, let me say here and now for the record the Emerald Pro need NO pedals to do pretty much anything you could want. I would have never dreamt of an amp that could do Larry Carlton and EVH but this is that amp. As for cabinets and speakers, I have only played it though 4X12 cabs so far. While she sounds incredible through both ceramic and alnico speakers, my hands down favorite is through a semi-open back 4x12 loaded with Celestion Alnico Blues. Amazing is all I can say! This truly is one of the most amazingly versatile and toneful amplifiers made IMHO. And if you are looking for an amp that can do cleans that will compete or rival any out there, do smooth refined overdrives or go all the way to flat out raw and rockin then this is an amp you really should give a try if you are fortunate enough to come across one in your travels. I'm sure am glad I did.