20 Most Recent Rockford Fosgate Power 351M Car Audio Amplifier Questions & Answers


The remote wire goes to the back of the radio to blue remote or pwr antena blue wire, solenoid? No idea ..Is the amp on all the time, the radio is suppose to turn it on and off..

Rockford Fosgate... | Answered on Mar 07, 2018


Specifications Dynamic Power Rating (measured at 14.4V):
  • 4-Ohm Load: 175 watts x 1
  • 2-Ohm Load: 350 watts x 1

Rockford Fosgate... | Answered on Jan 29, 2013


You have connected it to the wrong power wire - one that is only active in service mode - first key position.
You should draw a wire directly from the battery (don't forget to add a 40 amps fuse on the wire) to the amps. If you don't want them constantly operational (you will have to manually shut them down) install a relay on the wire with the command coming from a wire from the instrument key position - second position of the key. Use a voltmeter to identify the wires.

Rockford Fosgate... | Answered on Oct 15, 2010


hook up the power to the battery and the amp then hook the ground up to the body of your vehicle then hook the RCA's to the back of the radio and the amp. Then you have to run the remote wire to the back of the radio and to the amp. On the speaker outlets you can either hook it up bridged or regular but bridged will get you more bass or power.

Rockford Fosgate... | Answered on Nov 18, 2008


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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