It sounds incredible, a bit bright but not in a bad way, easily dialed back. The parametric is extremely responsive, more headroom than a 747. Swapping tubes at will, with different combinations, no biasing needed, Awesome. It is real loud, if you live in an apartment be careful you could be evicted. Tonal options are endless. You have to use processors and or pedals if you need FX's or specific types of distortion, I.E. Metal, but you can't beat the tone of this amp at any price range. The channel cascading mod Randy made famous is built in stock. If you are a Plexi fan but can't afford one, this is better, and it's in a realistic price range. Yes I said "better" 150 Watts of absolute ear joy. It bleeds tone all over the place. I am using Gold Lion 6L6's in it right now, the tone and sound cannot be described in my limited vocabulary. It turns your pedals and processors into tools, not something to hide behind. It allows you and your guitar to shine, the amp seems to breath, it is amazingly responsive. If you feel you need an attenuator invest in a quality unit, the built in Phase inverter (attenuator) sucks, the only bad thing I can say about it. The effects loop offers a true bypass and when in use it has no affect on your tone, a good thing. I have several tube heads and combos, for the money I cannot imagine a better deal. It sounds better than my 2K Mesa. "for real" it is louder than 3 Classic Peavey 400's (that is stupid loud if you don't know) don't let the vintage concept fool you, "yes if you are a Jimmy Page fan you will be ecstatic, but I also use a MetalMuff and a H&K Warp thru this head, Nice,.... It does it all, "well" and then some. You can discover yourself in this amp. Only someone with no ears could make it sound bad, even then it would likely still sound good.