first off i really have a thing about tube amps made in china. they sound really chump compared to american or british. my opinion.
second, shouldnt they test these things before they send them out? mine is brand new. i have played it through all my bass cabs.my 50watt amp i cannot turn up past 3 or my windows will shake out of my house. this 300 eden volume 3 sounds like volume 9.5,, crap, and not very impressive for the 300 watts it boasts as i mentioned earlier. and if only kt88 are usable, then how come they cannot simply tell me that. i dont like people who sell things they cannot back up with support.
third, i would rather use 2, 50 watt heads (which is what i do now) over anything else. unless i am playing a stadium, i really see anything more as superlative.
i dont know all the technical whereasses, but i do know what my ears hear. i have about 10 or so tube amps, and this one is on the list of get rid of.
i also seem to have a problem with these mass produced higher end guitar warehouse amps. i have ruined several mesa drivers, as well as a couple amps. crate,,,, please. i had a GK i thought it sounded pretty decent. SWR mmmmmmmmmm,,,ok. i always go back to the fender bassman ten 50watt head i have had for 25 years. i find the more wattage, the more problems. like the 8x10, man they look cool. how often you replacing speakers.
through my experience if you are not spending the money on a boutique amp or paying to have something modded to actually be cool, you may as well save the money and get something cheaper and maybe stay with an SS amp. if i wasnt such a tweaker i would be happy with a sunn beta lead or my old GK