First I have to say this is way over priced, hence 4 star rating. But it does do what it says on the tin, so to speak. Standard blues cube is pretty much 6L6's so we're in Fender bass man territory. With the capsule you get the class A EL84 quality spot on. Great with whatever I put through it. Especially impressive is my Les Paul sound now. It is everything I ever wanted. My Stratocaster sound now has its choice of both worlds. Right at this moment I have the NY tone capsule in full time and have locked it down with the included plastic dome. I don't think I'll be removing it any time soon. Is it worth the money? No! It should be a lot cheaper, plus I was hit with import fees which really stung. The NY capsule is, I believe, the best of the available ones to date. If you can afford it, get it. You won't be disappointed, but the price is off putting for many I imagine.