Hello, new here and not totally up to date on car audio lingo. I installed a Rockford 12” sub and ported box and an alpine mrp500 amp in my Tahoe. It worked fine for the last 3 years and now it is cutting out at high volume. It plays fine until volume hits about 50%. It appears that at higher volume the on light begins flickering and I loose sound. If turned back down it begins to play again. I have trouble shot the wire and it’s not the issue. If I jump from the hot wire into the amp to the remote, it plays fine at all volumes. Could this be an issue with my amp or possibly the voltage/amperage fluctuating throughout my vehicle? I installed a new battery but have not checked the alternator. Any help is very much appreciated!!