well, i dont know why ppl are bashing the 4x10 'pyramid' cabs. Mine blows away any other amp i've ever heard (with '73 Bassman 100). Sweet vintage tone out of this rig, man.
More tone than youre going to get out of modern amps for sure. I played thru my buddy's Carvin/4x10/1x15 and yeah, it had TONS of punch, but no tone at all. Now, it would be interesting to hear my amp on that speaker rig, and I cant wait for the next jam night to try it out.
From years of gigging and shlepping (i used to carry that cab up 27 stairs by myself, regularly), the pyramid parts, (the wood pieces that form the pyramid) had come loose and were making an awfull racket. But some sealant and some well placed deck screws tightened it back up to its early 70's prime.