I have a 1972 or 1973 V4 that I absolutely love the tone of... but I play in a band that's goal is to be as loud as possible (bluesy/doom metal). I currently run the amp into two separate 4 ohm cabs for a total impedance from the amp at 2 ohms (max output) - which is already pushing a lot by playing bass through a g***** head according to some (even though there's very little difference in wiring between the early model V4s and V4Bs). The cabs I have are a 1974 Sunn 415M and a 2000s Ampeg 810e. I have a few questions, but let me give a disclaimer first: I do not want a hybrid or solid state amp, unless I am using said amp to slave from my current tube head. Also, I don't have the luxury of having PA support at any of the venues I play at, so it needs to be without that in consideration. I also would rather not get a "tube-emulating" pedal. 1. I have considered getting a more powerful solid state head and running the V4 into the SS and then running into the cabs, but would that even work without damaging the V4? Or would it (mostly) even keep the tone that I currently get out of the V4? (I have tried a Peavey 260 Booster to run the V4 into and then each head feeds one of the cabs, but it was a negligible amount of volume difference because I had to switch my V4 back to 4 ohms.) 2. If I got a second amp of the same era/series (either another V4 or a V4B), or possibly a Sunn 2000S, and chained them together, would I even gain much volume since I would then have both heads operating at 4 ohms? 3. If you think 1 & 2 are bad options, which of these 300W all-tube heads would you recommend for my application? I want the overdriven tube tone I get with the V4 as much as possible but with more volume, in other words, I don't want a "clean" tone. - Fender-era Sunn 300T / Fender Bassman Pro - 70s SVT - Traynor YBA300 - Fender Super Bassman 4. I could possibly do a similar thing to #2 but with a 300W head from #3... but that seems dangerous. If that's possible, would you need the more-wattage amp at the beginning or the end of the chain? 5. Carrots Sorry for the long post but this has been a dilemma for a few months now and anyone I play with or know personally that plays doesn't have experience with these options and therefore don't have an educated or experienced opinion.