amp help

[w0lv3121n3]

I just purchased an alpine mrx-v70 5 channel amp
its wired with a 4awg power cable with 60 amp fuse and 4awg ground as well
I have an alpine cda-9886 headunit with alpine front speakers and polk rear speakers
i have all 4 channels and subwoofer connected to the amp.
it plays perfectly fine and low volumes but once i start turning it up the signal seems to cut out.
the amp is still on, looks perfectly fine.
once i shut the headunit off and start it again, the sound will come back out, until i turn it up loud again
any ideas whats going on?

[keep_hope_alive]

likely the speaker wires on the head unit are shorting out. turn off the internal amp and properly cap the speaker wires (individually)