ok well heres what i have

Power Acoustik fubr 12s
Power Acoustik 1400 watt Plasma Sphere amp
Power Acoustik cd player

I ahve the sub ran mono to the amp.......heres my problem when i turn the volum up pretty loud the amp will cut off and if i just turn the cd player on and off the amp will kich back in. now when i have the bass turned up it will cut out sooner then if i had the remote turned down. The system will still pound hard but when it just gets to a point it will cut out.any help would be great.

Sounds like you're pumping too many watts into the amp. How much input can it handle? You may need RCA in adapters.

how can i find out how much input it can handle?

If it has RCA-ins it has a standard amount. I think the inputs are rather low for RCAs. Like 50 Watt total? (That's just a guess though).

it has rca ins

If the amp has RCA ins and your CD player has regular outs you'll need RCA converters to change it to RCA output or at high power it'll clip. Also speaker phasing is important.

It sounds to me like your amp is killing your battery's reserve. You should definitely look into getting a cap for that system. I would suggest 1 farad for every 1000 amps of power. So you would probably want a 1.5 or a 2 farad cap. You should be able to pick one up for $75-$150. It keeps 12+ volts in reserve and keeps the amp from running short on power. If you were overloading the amp, it would blow a fuse and wouldn't cut in and out. I think you're overloading the vehicle electronics. If you used a standard wiring kit, you should be running only 50x4 max to the amp.

Just my .o2

BM

i had the same problem in my mustang, at night when i was driving my lights would dim every time the bass hit ,added a couple of capaciters problem cured