Is there a difference in how loud a tube watt is vs a solid state watt? Or.... Why is it a guitar player can bring a 30 watt single 12 combo up on stage, barely turn up the volume and be loud as heck vs a bass rig? I guess what I'm asking is what is going on between not only tube vs solid state, but even more so between guitar vs bass heads as far as loudness? Why does a bass player need a 300 watt head when a guitar player can get by with only a 100 watt head? Does the frequency spectrum the instruments cover have a hand in this?