1 amp cuts off

Bridge at 4ohms your only getting 600watts rms. You will need to bridge at 1ohm (parallel) and adjust the gain accordingly. This will give it 1600 watts rms. If you would of had a dual 4ohm sub, then you could of bridged it at 2ohms mono, but you can't you have to go either 1 ohm or 4ohm. I believe it's not getting enough power.

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first make sure your power wire is directly hooked to the battery, {make sure ure in line fuse is pulled} power wire that goes to positive of power cap , ground wire is grounded to chasis, now attach aditional power wire to amp and aditonal grond to amp . make sure all conections are solid and tight { also make sure inside of power cap is tight as well after long periods of time the insides loosen } i have 2 -1,000 watt sony xploid amps and 2- 1,200 watt sony expoid subs and they pound hard . i probley should have 2-1.2 farrid caps for what i have but it seems that its holding its own

I would not use a bigger cap, I would use a bat cap. If u dont know about these look them up they work wonders

1 cap, either .5, 1 or 1.5 farad will be fine. they make 5 10 and 20 farad that cost way more than u need to spend for 400 watts RMS. i like the rockford fosgates, you can get a low cost Tsunami, just make sure you follow the charging instructions.

Its not pulsing, its called clipping. The sound is being clipped due the amp being pushed past is power capacity and distorting the signal. This will damage your speakers very quickly. No amp should be turned more then 3/4 up. If its not loud enough you need to purchase a larger amp or be comfortable with the wattage it produces at 3/4 volume. You may also have speaker wires touching/crossed causing th issue.

amps could be overheating or the subs could be requiring more power then the amps are giving off.

Then the power wires going to the amp are not heavy enough to keep power to the amp.Or other causes can be the wires going to the sub are either loose or touching.Check all wiring for tightness and wires not touching..If all that checks out then try a different size wire to positive and ground wire Hope this works for you..Have a great day

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run a fused + wire from your battery to the + of the cap ground the - of the cap to a good grounding place on your car run a wire from the + of the cap into a one in two out disburtion block make sre it is a fesud one.then run one wire from each or the two out side of the dis block to each amp then ground both amps to a good ground.what type of amps do you have

Sounds like the output transistors on the amp are blown. Were you slammin when it stopped or how did you find out it stopped working. It could be the sub failed then caused the ap to go which is why you get a little something from the JL.

when your amp cuts out,is it when your stereo is produceing a long low note.if it is then the problem lies within the power distribution from the battery.as your sub pulles a long low note it draws a lot of power and sometimes the battery cant supply the power fast enough and the amp cuts out. useing a power cap is one way to solve the problem,but the best option for you to use becouse your running high powered amps is to have a sepparate battery for your audio using a split charging system.when your car battery is fully charged a relay swiches the power so that it charges the audio battery,so your auio system will have constant power without putting stress on your car battery. you can get thes from all good audio shops. hope this helps you.