Hi, there was a thread sometime ago about this but i just cant find it, i been searching, can anyone point me too it or help me out? I would use it with a 4ohm quad, most likely a new epifani 410ul. both have flexible eqs, both are compact and light, both have similar power ratings... hmmm. i've played the wt550 a quiet a number of times but i would have to get the thunderfunk on 2 week trial. (least i can do that!!!) Question: they're both supposed to be fairly clean amps, but which one will growl the most with the pre cranked. obviously the eden has a tube... and i have gotten it to growl a bit when trying it. people say the 'funk doesn't do it, but i thought i would ask. not a driven sound, just a bit of warm growl... thanks.