I just got a brand new Rockford Fosgate punch 150 25 to life. I disconected my old amp and hooked the punch 150 up. When I turn on the ignition I hear what I describe as a electronic squeal like sound. The sound is NOT coming from the speakers it is coming from the amplifier itself.
If I move the amp around the sound will change much like when a microphone is too close to a speaker and you get feedback. Sometimes the sound goes away completely depending on how the amp is angled it seems. Let me know what you guys think. Thanks