Is it fine to run a 4 string bass guitar through a guitar combo? I have a traynor 80 watt with 2 12's in it. The speakers are 70 or 80 watt...i think 70 watt celestions. My primary goal is to play with a drummer...where ive been told that you should have at least 50 watts. My concern really is for the speakers...i dont want to damage them as i suppose the amp can take it.