Hard Rock, techno, rap go with ss.
Bartokfan (Threads | Answers)
I disagree. It depends on the watts produced by the tube amp, and the design of the amp.
My VAC Phi 110/110 (110 wpc. push/pull) is excellent on rock, and has solid bass. The 140 wpc Wolcott Audio P280-S and the Dodd Audio 120 monoblocks would probably be other good bets. There are others, also.
There are too many variables to allow lumping tube amps into one pile and SS into another pile.
However, Defiantscientist specifically asked about <50 wpc tube amps for bass heavy music, and in this instance, he is going to need high efficiency loudspeakers, or a solid state amp.