As the title says , my 4 channel amp goes into protection mode when I turn my volume up to about 18-20 , causing a loss of sound . My set up was working fine for about a month . I don't have a capacitor and have not changed my alternator . I could crank it up as loud as I wanted it with no problems at all , but now it cut's out and the protection led lights up red for a few seconds . When I turn the volume down , the sound comes back and the red led changes back to green . My mono amp keeps playing my subs just fine . Any help is always appreciated .