Question about Rockford Fosgate Punch P450.4 60W x 4 Car Amplifier Car Audio Amplifier

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Rockford fostgate punch p450.4 does anyone have a diagram or a blue print of this amplifier? mine got busted, i need to replace 3 mosfets, 8 resistors and 5 diods. they said my pre ampsection was busted. any tips there/ would very much apreciate it many thanks!

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Rockford Fosgate Amp Repair Guild

I would love to get a copy of that repair guide you made. Could you please

Posted on Sep 02, 2007

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SOURCE: rockford fosgate punch 700s gets very hot

Disconnect the speaker wires from speaker terminals on the amp and turn the amp on (turn the head unit on). Set the volume to zero on the head unit.

Does the amp get hot?

If it does, either the bias is set to high or the amp has other problems. If it does not, you may have the speakers wired to the wrong ohm load.

Posted on Nov 05, 2008

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SOURCE: Rockford Fosgate Punch 800 A2 shorting out.

replace the inputs on ur amp

Posted on Jun 29, 2009

Professor_V
  • 92 Answers

SOURCE: Rockford Fosgate Punch End CapsEnd Caps

I TAKE IT THAT YOU ARE REQUESTING A SOURCE FOR A PAIR OF ENDCAPS FOR YOUR PUNCH-200IX. IF THIS IS THE CASE, I SUGGEST THAT YOU CHECK EBAY ON A WEEKLY BASIS AS I AM SURE AFTER SOME TIME, YOU WILL SEE A PAIR LISTED. THERE IS ALSO A SELLER ON EBAY THAT HAS MANY OF THE LOGOS FOR THE MANY DIFFERENT MODELS THAT CAN BE PLACED ON ANY OTHER MODEL ENDCAPS FROM THE SAME SERIES (DSM, IX, X2, ETC. LET ME KNOW IF I MISUNDERSTOOD YOUR REQUEST......V

Posted on Jan 06, 2010

so_cal_steve
  • 25 Answers

SOURCE: Rockford Fosgate Spare speaker termal screws

if you have one that you can compare to another, go to home depot with that and match it up. If not, take the amp to home depot and get someone to help you find the right one.

Posted on Jan 29, 2010

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I have a Rockford fosgate punch p1000-1bd an it burn can you help me with the number of the mosfet in the power supply


Can't get your link to work. If you need a cross reference try mouser.com of digikey.com or mcmelectronics.com. if you want to have it repaired try linearpower.com. their sister company is t.i.p.s. and the owner is very well known for quality work.

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if you have one that you can compare to another, go to home depot with that and match it up. If not, take the amp to home depot and get someone to help you find the right one.

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depending on how good you are with electronics and soldering,you may be able to.i used to do warranty repair for rockford and they use mosfet semiconductors in the power supply.it is probably repairable cheaper than a new one,but by someone that knows how to do it.

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Rockford fostgate p500-2 amp overheating pls help!


Your Amplifier:
125W x 2 @ 4-Ohms RMS
250W x 2 @ 2-Ohms RMS
500W x 1 @ 4-Ohms bridged RMS

Your Subwoofers = Dual 4 ohm
Possible wiring configurations of (2) Dual 4 ohm voicecoil subwoofers are:

2 ohm Stereo
1 ohm mono
4 ohm mono


That amplifier is not 1 ohm mono stable.

You need to put a 4 ohm load on the "bridged" terminals of the amplifier

Your best wiring configuration is going to be Series-parallel.

CLICK HERE to see the pic Larger

4721108.jpg You can also get the same result (power) by having the subs wired in parallel independently. Put both + on one sub to one + on the amplifier and both - on one sub to the - of the same channel of the amplifier.
Repeat for channel 2.
This will be a 2 ohm stereo load.
You should only use this method if the subwoofers are in seperate enclosures... not one big cavity.

Thanks for using FixYa -a FixYa rating is appreciated for answering your FREE question.

May 03, 2009 | Rockford Fosgate Punch P5002 Car Audio...

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Not a problem just a question


  • 100 watts RMS x 2 at 4 ohms
  • 200 watts RMS x 2 at 2 ohms
  • 400 watts RMS x 1 at 4 ohms in bridged mode
  • stereo or bridged mono output
  • 4-ohm stable in bridged mode
  • Tri-Way capable
  • requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
  • 50-250 Hz high-pass/low-pass (12 dB/octave) crossovers
  • wired remote included for fingertip control of Punch Bass (0-18 dB boost at 45 Hz)
  • MOSFET power supply and output devices
  • MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability
  • TOPAZ — noise-killing differential inputs that eliminate 80% of ground loop noise
  • Trans•ana circuitry keeps preamp voltages low and signal paths simple for outstanding audio quality
  • NOMAD — advanced protection circuitry for "intelligent" shutdown protection
  • speaker- and preamp-level inputs
  • 11-1/8"W x 2-3/8"H x 9-7/8"D


  • Wire your sub in bridged mode (4 ohm mono)
    + to + on amplifier
    - to - on amplifier
    (using bridging terminals)

    Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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    The amp is blown and need to be repaired.
    You can contact Rockford direct to find a repair dealer.

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    301x amplifier


    Good luck. Rockford Fosgate does not sell or release any service parts/diagrams AT ALL. They want you to buy a new one or send it in to them to be repaired at an exhorbitant price. Also, from my experience, most RF amps are unrepaairable due to their construction design. the outputs are case soldered and cannot be removed individually. Time to upgrade.

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