AB Systems Model 710 Monaural Biamp Power Amplifier. Recently obtained from a pro audio rental facility that was liquidating excess equipment. Unit is tested and working. No issues to report. The 710 is a single channel biamp, w/ 1 channel at 500 watts and the other at 100 watts. See photos for more details. No other accessories included. GRAB IT WHILE YOU CAN! Please do not open any cases or claims without contacting us first. We will be able to resolve any problems directly and make sure that any issues are taken care of immediately. Our perfect feedback speaks for itself. THANK YOU FOR YOUR BUSINESS. Track Page Views With.