With a valve amp, it usually refers to
clean headroom - how loud it gets before it starts distorting. Not a big problem for guitar (we likes our amps dirty, like our wimmen).
Keira WitherKay wrote:
best is just buy one powered speaker with a 12 and horn and about 200W and your vocal needs are sorted ... these range from cheap behringers to expensive bose
This is a good option too. A lot of powered speakers and monitors have mic inputs these days.