I play background dinner music (standards) in a jazz duet (keyboard & bass) at a local restaurant. We typically play through our amps in one corner of the restaurant and just guess as to our volumes. This week I purchased a portable PA system with two speakers, plugged both instruments into it, and left the amps in the car. It was perfect! I loved hearing both our instruments mixed in each speaker vs hearing my bass amp in one ear and the piano amp in my other ear. When the manager gave me a wave that we were getting a little too loud on "Cherokee", one knob easily turned us both down. Now, my bass tone wasn't as nice as playing through my Mark Bass rig, but the overall experience was wonderful. Am I on to something or just late getting to the dance?