I just bought a used dsl 50 head from GC that as it turns out is way too noisy. By way too noisy I mean on lead one with minimal gain and low volume it howls and hums with all of my guitars. I swapped preamp tubes and it does the same thing. I should have played it louder in the store, but I can return it. I have a chance to pick up a tsl 602 but want to check with you guys first. Most of what I gather in forums is that the dsl series sounds great the tsl not so much. I always assumed that the tsl used the same circuitry as the dsl just with a second set of eq controls. If that is the case shouldn't they sound very similiar. Don't get why there's no love for the tsl.