I recently got a hold of a 1970's Ampeg V-4B 100 watt tube head. I instantly fell in love with it's sound, but I'm a little scared that this is not going to be powerfull enough to keep up with my band. I've only played it thru a Ampeg SVT410HEN cab and it wasn't quite loud enough. I heard that these amps really shine with a super efficient 2x15" cab hooked up to them. I was just wondering if you think this will give me the volume and tone I need, and also recommend me a cab. I'm looking at a 2x15" Sunn cab right now. It's huge, and should be fairly efficient. Does anyone know what cabs were matched with the V-4B head when they first came out? I really need to know if I can get the sound out of the 2x15's or if i should just use the V-4B to power a single 15 and for my tone to send into another amp powering a 4x10 or another 15.