Question about Rockford Fosgate Power 1051S Car Audio Amplifier

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802 rockford Fosgate amp

Hooked up amp the led comes on when the rca wire is in but no sound comes out Led fades out slowly. All fuses are good remote wire has power power wire has good power. work great in other car but can't get it to work in my new car same deck wire etc. if have any tips please help.

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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 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.

Posted on Apr 28, 2009

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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

  • 2 Answers

SOURCE: Rockford Fosgate Punch 401s starts then smokes

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

Posted on Apr 29, 2010

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My fosgate amp was workin an now it wont trun on can u help me out plzzzzz.....thanx for ur time...

First check your fuses, all fuses. Then check to see if it's getting voltage to it, look to see if any of the LEDs are lit up, power, protection (over /under voltage, overload (short)) or none. If the power LED is lit & no others then check your RCAs coming into the amp by replacing them or using a multimeter set to ohms to make sure they are not loosing a connection due to wire breakage inside the casing. Cheap RCA's will easily disconnect inside the plug just from twisting them. If they are good and are not disconnected from the head unit, then check your speakers for damaged coils or loose wires, who knows they may have fallen off? If your amp has more than just power LED lit then you may have a short in your speakers or wiring disconnect the wires to see if the protection LED goes away. if not and it's still lit then repair the amp. If there are no LEDs lit at all, check your remote turn on wire from your head unit to make sure it sends out a 12 volt signal to the amp. You can also jumper a wire from the 12v battery connection over to the remote turn on connection to see if it will power up. If not then check power wires and connections, fuses, Battery , alternator, voltage regulator, etc.. any thing that has to do with your cars electrical system may have fried from the current draw by your amp.

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Sub amps are pretty straight forward.....Hook up you rca cable....then all thats left is you positive (B+) that goes to your battery....the negative that you should hook to a good paint free bolt in your trunk and the remote wire which connects to your stereo.....

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1 Answer

When i put power to it i dosent turn on or the led light dosent come on

do you have the remote power wire hooked up next to the battry wire ,have you checked the fuse and do you have a good ground

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1 Answer

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You should verify some other way (with a multimeter or another amp/device) that your 12V is working at the amp. Then to troubleshoot the Remote wire, take a short lead of scrap wire and run it from the 12V power input of the amp over to the Remote input like a jumper. If the amp still doesn't power up, then look for and check the fuse on the amp. If there's good power at the amp, the remote input has good power, and the amp doesn't turn on, and the fuse isn't blown, then the amp is probably toast. Good luck!

Jun 17, 2009 | Rockford Fosgate Punch 301X Car Audio...

3 Answers

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

try hooking the remote wire to a rem wire on the back of stereo. post and let me know results

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1 Answer

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Check the signal from your RCA'S   Your head unit may not be putting any output out of the rca jacks on the rear.  Or you could have a bad set out.   As long as your voltages are right on your positive terminal and remote and you have signal the only other reason your amp will not have any output is if the internals are bad.

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There are two LEDS. One on top and one on the end. Did both light up? If not, which one lit up?

Sep 13, 2006 | Rockford Fosgate Power 1001BD Car Audio...

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