The V-4 is one of the best amps the world has ever seen! I have a 1976 VT-22, which is the 2x12 combo version. In proper condition, it puts out 120 Watts of massive tube tone. With good speakers (and I don't think a Crate cab fits that description), that amp will melt the first four rows of the audience, before you crank it into the distortion 'sweet spot'!

Don't let anyone talk you into putting a set of sorry-ass 6L6s in there. It takes a quad of good 7027As to do it justice. And JJ Tesla have re-introduced the 12DW7A preamp tube, so there's no excuse for bad tone.