Question about Rockford Fosgate Punch 201S Car Audio Amplifier

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201s amp isn't working

I have just bought a second hand 201s amp, wired it up and it isnt working. there is power getting to the amplifier as i have tested it with a tester but there is no sound coming out the other side. i am at my wits end and am out of ideas.

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  • mnbv Dec 02, 2007

    i hooked up amp and all but the led light isint going on and no sound NOTHING



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The meter set to DC volts

The black lead on the ground terminal of the amp

The red lead alternately on the remote and the B+ terminal


You should have read 12+ volts. If you did, and the power light was not on, the power supply was not producing regulated voltage. This is generally due to blown power supply transistors.


Ordinarily, if someone wants to repair their amp themselves, I'll try to walk them through it but this amp requires more than basic skills and tools to replace the power transistors. This is best left to an experienced tech. Try to find a reputable repair shop in your area to have it repaired.


If you can return it, you should do so. Do not remove the back cover if the tamper-evident seals are intact. If you do, the seller will almost certainly refuse to refund your money.

Posted on Oct 16, 2007


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2. Use a jumper cable to hook up the ground to the battery ground.
3. Install fuse and test.

If it continues to blow you have an internal amp problem.

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Hello jon_jonmay,

Wiring 4 speakers to each of 2 channels, you will need to wire them series-parallel and run them at 4 ohms. If you wire all 4 parallel, the load will be 1 ohm and the amp is only stable down to 2 ohms.

According to your manual, the 201s will deliver 50 watts into each channel at 4 ohms . So it will be supplying about 12.5 watts per speaker which is about what you get with the average factory radio. They will work OK, but they're not going to be very loud.

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Hello mhjoubert,

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Actually, it's probably a better idea to install a low-level converter on the receiver speaker wires and then use the RCA connections for input. This way, you have better control on the input signal, lessen the possibility of induced noise, and do not need to worry about an impedance mismatch causing problems.

You can download a copy of the Rockford-Fosgate manual here:*&p_li=

Hope this helps.

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