Can anyone give me advice on a small (30 watts or less) amp to use for learning bass parts and playing along with a record, CD, tape. Or is there some other tool besides an amp that could be used to practice with. I don't want to take my band rig back and forth. Is it OK to use a guitar amp (eg Vox Pathfinder 15R) at very low volumes? Or would I risk damaging the speaker even at low volumes. I've done it a few times with no ill effects so far. Oh by the way I want it cheap!