20 Most Recent Rockford Fosgate Punch P450.4 60W x 4 Car Amplifier Car Audio Amplifier Questions & Answers


Capacitors are blown on the output side most likely. That amp isn't made for subwoofers. It will cost about 100 bucks plus shipping to send it to a competent electronics shop that has the ability to to that. If you are handy with a soldering gun, you have open it up and look for blown capacitors and replace them yourself. They sell them all at Radioshack.

Rockford Fosgate... | Answered on Mar 25, 2011


There is no reset button on the amp.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low. If both are above 12v, the amp will require servicing.

Rockford Fosgate... | Answered on Jun 16, 2008


Hi Jon,  you need to hook the Remote wire up to the Radios  Blue remote wire.  The car battery power stays on all the time.  The blue Remote wire watches to see when the radio turns on, and signal the amp to turn on as well.

Rockford Fosgate... | Answered on Oct 28, 2007


First off will the fastener turn ? If not try using a bit of wd-40 and letting it "soak" for a little while . Also be sure you are using a good proper sized Phillips screwdriver . If the fastener still won't turn try using a can of "computer duster " inverted so the liquid comes out , note this will be well below zero degrees , and freeze the screw head , then try turning . If the fastener is stripped and the ttol slips you will have to remove the amp cover and grip it with a pair of vise grips ,pliers or a flat blade screw driver .

Rockford Fosgate... | Answered on Sep 24, 2019


You may not have enough ground connection or your are running too much power for your amp

Rockford Fosgate... | Answered on Jun 12, 2019


Yes. Wire the two 2 Ohm speakers in series and connect them to one channel. Connect the 4 Ohm speaker into the other channel. This will give you a balanced 4 Ohm load on each channel.

Rockford Fosgate... | Answered on May 12, 2019


i have a punch 45 but i'm missing the speaker wire connector.... were do i go to get one...

Rockford Fosgate... | Answered on Feb 03, 2019


Please be more specific. RF doesn’t share schematics

Rockford Fosgate... | Answered on Feb 03, 2019


IF you are looking for a schematic diagram on the amp, you wont find it. IF you need the connection information you can look on their site, There is a repair video on that unit attached . Rockford Fosgate Car Stereo Amp Repair

Rockford Fosgate... | Answered on Jan 13, 2019


Found an online owners manual for your Punch P500.2. This only covers installation and setting gains etc and doesn't have a circuit schematic repair diagram -
Rockford Fosgate Punch P500 2 Manuals

Rockford Fosgate... | Answered on Sep 10, 2018

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