Question about Rockford Fosgate Car Audio & Video

Open Question

Rockford fosgate p400-4 cuts out/ goes to protect mode

I have a rockford fosgate p400-4 pushing 2 pair of rf p152-s component speakers- when i turn the volume to a high volume the amp cuts off & on- goes into protect mode comes back on then protect mode etc. etc.- runnin 0 gauge wire to a power & ground blocks shared with a rf p1000-1bd -

Posted by Anonymous on

6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Rockford Fosgate 800a2 To 2 SVC 2ohm subs

Ok.. Bridge the two sub into 4ohm than bridge to amp.

So. this how it goes.

sub1 + -
to      | |
sub2 - +
=      4ohm

           From Sub
            -          +  
            |           |
amp (L) - + (R)- +

This will use the full potiental of RF 800a2 amp. I believe it like 1153 watts max out.

Posted on May 29, 2008

  • 149 Answers

SOURCE: jl audio 1000/1 low voltage -keeps shutting off at high volume

You should definitely upgrade the power wire to the sub amp to 4 gauge -absolutely your choking your amp its starving for current-poor thing is starving !!!!!!!

Posted on May 12, 2009

  • 309 Answers

SOURCE: 401s Rockford Fosgate Amp. Not powering on,just protect lite is on.

the problem is mostly with your audio side of the amp. i have a 800 Rockford punch series amp hooked in series running at about 15 vdc at 2 ohms stable for now. but the amps left front power side transistors overloaded and smoked out, i will be replaceing my mosfets soon. Now on that side your issues apear to be related to the signal side of the amp. when you hooked the amp up tell me breifly did you hook the rca inputs to the back of the sterio and did you select the proper rca inputs for the amp? also note that amps have a potentiomater that can be tuned up or down to allow the volume or wattage to go up or down threw the system. if it's turned all the way down you'll here nothing. but often you'll get a pop sound or quickly see the speaker move a bit. this indicated the signal side of the amp has signal comming in but no output, just look for a turnable small screw inside the amp top or side. and turn up acordingly. note: to much output will damadge your system. not just the amp. ;)

Posted on Aug 28, 2009

  • 3 Answers

SOURCE: rockford fosgate 450.4. 1st protect mode, now blows fuses...

smell it !

Posted on Oct 13, 2009

  • 31 Answers

SOURCE: the overcurrent light on my sony xplod amp

Contact eric @ Capital Audio & Electronics Repair in Tallahassee,Fl 850-339-1130 we repair all namebrands & models

Posted on Mar 20, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Hey I have a rockford fosgate t2500bdcp-1 when ever the bass is about to hit the amp goes to protect mode and comes back on

If you can tell that it is about to hit and the amp goes into protect mode, the amp is being over driven on the input.

Feb 06, 2017 | Rockford Fosgate Car Audio & Video

1 Answer

Protect mode?

You added speakers in parallel which reduced the effective impedance to to a value low enough that your Rockford Fosgate amplifier had to enter protect mode to prevent damage to its output stages.

Jan 22, 2014 | Car Audio & Video

1 Answer

Rockford R-1000-1D going into protect. Hooked up to two P3D212's. Wired at 2 Ohms. Not to mention checking and double checking and triple checking all the wiring to and from the amp. What could be...

  • First of all this amp is not "bridgeable" per the data sheet and Rockford Fosgate's. Short story your overloading the amp. You may be able to physically run it "bridged" but it is going to kill the amp. No doubt the set up will pound... itself right into the amplifier graveyard. The amp does not have to get hot to go into protect mode, it only needs to sense a malfunction as well.
  • Something else to. The speakers are rated at 2 Ohms as well as the amp (2 Ohms) That means the least Ohms you can but to the amp is 2 Ohms. When you bridges them 2 speakers you drop it down to 1 Ohm. Unsatisfactory for the Amp to function properly.


Jun 01, 2011 | Rockford Fosgate R10001D Car Amp

1 Answer

I just need to know if the crossovers that come with the T1652-S Rockford fosgate have fuses . to prevent the speakers and tweeters from being burn out. or for safety purposes

The fuse like componets in the crossover are not fuses and do not provide absolute protection from the speakers blowing. As you turn the volume up you will notice that these fuses will begin to light up along with the music. Whats happening is as they light up they create resistance to help prevent the speakers from blowing.

May 15, 2011 | Rockford Fosgate T1652S Car Component...

1 Answer

Quick question, amp problem

make sure you ground wires arent shared, meaning run each ground wire from each amp to its own grounding point

Sep 08, 2008 | Rockford Fosgate P3001 Car Audio Amplifier

1 Answer

Rockford Fosgate 501bd question

that amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 500-600watts coming from amp, you should be getting 250-300 watts per speaker,just dont crank your gain too high on the amp.

Aug 29, 2007 | Rockford Fosgate Power 501BD Car Audio...

1 Answer

RF P3001 power problems

check your sub woofer connection if you have multiple subs the could be wired in a parallel or with has to many ohms that my cause it to not hit right and cause the amp to get really hot and cut in and out

Nov 15, 2006 | Rockford Fosgate P3001 Car Audio Amplifier

Not finding what you are looking for?
Car Audio & Video Logo

Related Topics:

51 people viewed this question

Ask a Question

Usually answered in minutes!

Top Rockford Fosgate Car Audio & Video Experts

Tygh Duval
Tygh Duval

Level 2 Expert

300 Answers


Level 2 Expert

92 Answers


Level 3 Expert

75797 Answers

Are you a Rockford Fosgate Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides