Help Punch 150 Amp making noise Not speakers

[gamebucketman]

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

[iDesignBoxes]

Is it under warranty? I would get my money back or trade it for another one.

[gamebucketman]

well I put the endcap on and the noise stopped. Is it a safety feature maybe because the endcap is a pretty big piece of heatsink? either way it is working perfect now.