I have a rockfored fozgate 400w amp it was

as your sub is only rated to 400w rms simply connect the sub to either a or b channel outputs you may wish to use an rca splitter before the amp to feed both left and right audio channels into a single channel on the amp. WARNING connecting both channels on the amp to the sub will overload the sub and possibly blow it up so i highly recommend not doing so.

Use shielded cables.
BTW, how did you check the cables to determine that they are okay?

almost any amplifier amp would push a 400 watt sub. try to stick with a name brand, and steer away from no name brands like boss, jensen, etc.you will only need a 2 channel amp to run your sub.you will need a second amp to run your 6x9'sor you could get a 5 channel amp, and run all your speakers, and the 5th channel for your sub

you can run your amp at 1 ohm you would need to to have the right ohm subwoofer wired in parralle to get 1 ohm at amp ...... the put a 12 volt fan in the area to keep the amp cool so it doesnt over heat if you plane to
Audiobahn A2X400HQ 2 Ch Amp
1600w x 1 @ 1ohm - 800w x 1 @ 2ohm
600w x 2 @ 1ohm - 400w x 2 @ 2ohm
2-Channel High Current Amplifier -- Ideal for use with all Audiobahn Rack Mount Products


http://www.tintingbyfredjohnson.com

Rockford fosgate usually work best with 2 ohm speakers. Depending on the resistance of your speakers, will then give you best connection. Check the resistance for the subwoofers. If the subwoofers are two ohm then connect them directly right and left. But if they are 4 ohm connect them parrallel (positive to postive, negative to negative and bridge the amp.) Good Luck, please rate.

The slider or the amps for channel 1 may have a problem.

Sliders do wear out.

Try shorting channel 1 input and see if that affects the noise. A hissing noise is probably a bad preamp chip. That is shop work at a repair facility.

one sub per channel you can not brige this amp in to a 4ohm load because your amp is going to see 2 ohms and that amp is not 1 ohm stabel

1000W max power
<b>
165W x 2, 20Hz - 20kHz, @ 0.04% THD + N, at 4 Ohms
200W x 2, 20 - 20kHz, @ 0.15% THD + N, at 2 Ohms
400W x 1, 20Hz - 20kHz, @ 0.1% THD + N, at 4 Ohms
</b>
OTL (Output Transformerless) circuit
Pulse power supply
Line & High Level Inputs
.3-6V Level Adjustment Control (RCA Pin Jacks) 1.2-12V (High Level Input)
80 Hz, -18dB/octave Low Pass Filter Switch

check see if youy have some coving the vent or the speak connect right

my amp says Lo on the digital circle on top of the amp i have a mtx 9500 bridged to the amp and it cuts out at high volumes and suddenly please help