Mids/Highs/Four channel amp/ wiring problem?

[etaks_crew]

First I'll list my equipment, then the problem, then what I've done to check it out.

Head unit: Alpine 9881 ( I know not the best but it was free )

Mids/Highs Amp: 2x Alpine MRP-F300 ( Four Channel's )

Mids/Highs Speakers: ATM 8 6.5 CDT's ( Model Number ??? But A Good Match Power Wise For My Alpine's)

I have a yellow top style batt under the hood( cant think of the style they are called ) A AGM batt in the rear 109AH or 119AH. ( Dad bought it from a battery whole sale place it was a manufactures second hold voltage like an MF and is huge )

One run of 4/0 welding cable for the positive and one run for a negative.( Thickest stuff I could find anywhere on the net and around here pretty high strand count pretty flexible and weighs almost a pound per foot of wire )

Heres my problem. It first started about a week or so ago. When I would turn my CD player volume up to full tilt (around 25-27 out of 35 on this CD player) one four channel amp would cut out then the other would follow and cut out until I backed the volume down to about 22. As my week went on the volume I could listen to my CD player without it cutting out dropped now its to the point where I can't go above 14 on my CD player.

Heres what I've done I took the CD player out and apart didn't see any black or brown marks no smokey smells. I put it back in checked the CD player connections (RCA's, Power, Ground And Remote) all good. Started taking speakers out, all front ones out now, connections looked fine.

I've unhooked each amp and and ran just one at a time this problem still continued.

I've unhooked each amp from the CD player and ran them off my iPod through a head phone jack/RCA connector problem still continued.

I've unhooked all speakers and just ran one speaker, problem continues.

I've brought one of the amps inside hooked it up to my 2 amp trickle charger and my iPod everything worked fine.

Also IDK if this helps but when I ran off my iPod in the jeep and in my house the speakers got louder before the problems kicked back in.

Also the amp don't shut off they stay lite up and they don't 100% completely quit they try to stay playing every second or so but stops right away. maybe a video would help explain what it sounds like. Bare with me though lost camera charger and will have to make off my phone.

Please help. Give me ideas I'll check on the for another 30 minutes or so but then the misses will be here and we will be eating then it will be dark so I'll have to wait until tomorrow.

If anything is worded funny just ask what I meant and I'll tell you and edit my post.

[etaks_crew]

Video will have to wait for now, went to try and play it and nothing came out and its already getting dark no garage so will have to wait till tomorrow. But give me ideas throughout the night and I will try them or add them to the list of what I've done if I forgot to mention it.