Question about Rockford Fosgate Punch 400.4 Car Audio Amplifier

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My punch 400.4 amp stopped working is there a reset button or a fuse on the amp

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There is no reset button the amp check fuse on the amp wire make sure it's not blown

Posted on Jun 06, 2010

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I have replaced the lamp and followed the reset lamp instructions, but it won't reset the lamp - still shows to change the lamp. I've tried it several times.


Make sure you are punching the right buttons on the circle of buttons. There are inside buttons and outside buttons.
It took me several tries until I realized I was pushing the outside ones instead of the inside ones. Once I carefully looked at the button setup, I had no problems.

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1 Answer

I have a rockford fosgate punch P325.1 subwoofer mono amp that blows a fuse every time i start the car. I have a second pioneer amp but that works with no problems. How can i fix this?


Is it the correct size fuse ? Is it the power fuse or remote ? Either way check your connections going into the amp . Try this hook your other amp to the set of wires for the rockford if that amp has a problem its a wireing problem if not chances are its an interal problem on the rockford . Hope this helps !

Aug 19, 2010 | Rockford Fosgate Punch P325.1 Subwoofer...

1 Answer

Rockford Fosgate Punch P325.1 Amp keeps blowing fuses every time I start the car. What is going on?


well if the amp works with the car off and when you start it the fuse blows then you may have alternator issues use a volt meter to check battery voltage is not above 14.5 volts
if the fuse blows when the amp turns on then most likely you have a shorted output section in the amp.

Mar 18, 2010 | Rockford Fosgate Punch P325.1 Subwoofer...

1 Answer

Amp not working


It sounds like you either blew a fuse, or you cooked your amp. The fuse on the P200.2 amp is a 30A fuse, and it sits right next to the power, ground, and remote wire connections on the end. Pull the fuse out and see if it's blown. You should also check any other fuses that you have in the car before the amp.

Mar 03, 2010 | Rockford Fosgate Punch P2002 Car Audio...

1 Answer

Rockford fosgate 800 a2 amp power?


Hello desperate2le,

Watts delivered is a function of the voltage times the current. If the amp was 100 percent efficient, it would need 33 amps at 12V for 400 watts. At 14.4V, it would only need 28 amps. Of course, amplifiers are NOT 100 percent efficient, only about 50-60 percent in many cases, but somewhat higher for monoblocks, maybe 80-90 percent. So you're looking at a fuse in the 60-80A range. In the absense of a specific fuse size from the manufacturer, I'd start the primary fuse at a 60A and if the amp blows it on power up/immediately/frequently, move up to an 80A.

All of the Rockford-Fosgate 2-channel bridgeables I've ever seen show using the left positive (+) and the right negative (-) for bridging. But if it's not shown right on the amp, I'd call or email RF for the correct connection. The new amps do show it.

Hope this helps.

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1 Answer

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Can somebody email me the schematic for the Rockford Fosgate 401S?

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1 Answer

Punch 40dsm wont power up


There is no reset button, if you've confirmed that you have a good ground and sufficient voltage on the B+ and remote terminals, the ampifier is in need of repair.

If you're interested in troubleshooting/repairing it yourself, read through the following page to familiarize yourself with the inner workings of an amplifier.

Basic Amplifier Repair Tutorial

A common problem on these amps is broken connections on the remote turn-on connector lug. If it's loose in the board, that would be the first thing you'd need to repair.

Let me know if you have any other questions.

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