A few weeks we were playing in a community outdoor gig. There were several bands there and a few other bassists used my Acoustic B200 combo amp. It has casters. This one particular seasoned bass player; when it came his time, he turned the amp on its side. I meant to ask him if it made a sound difference but I got pre-occupied. Does anyone know why he would have done this. I was not on stage when he was playing so I couldnt tell. The amp was just used for on stage monitoring. I direct out with a GT "Brick" Preamp to the house.