Are you experiencing a like feedback or no power?
Set the and Music Master Volume to the minimum position. Plug the AC power cord into a grounded wall outlet. Turn on your audio source (karaoke player). Turn on the JBL RMA-220 amplifier. 5. System Configuration Guide Vocal and Music Balancing jbl rma 220 user manual NEW%21
Setting up the RMA-220A is straightforward. Follow these steps to ensure a proper and safe installation: Are you experiencing a like feedback or no power