Question about Rockford Fosgate P3001 Car Audio Amplifier

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I was using bridge on a Rockford P300 and blew my cheap speakers but now my bridge doesnt work. Bought new speakers and want to run in bridge mode is there a fuse inside maybe or did I blow it up?

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Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Your amp is clipping.
No internal fuses. Your mosfets are toast. A thumbs up would be greatly appreciated if this answer is helpful to you. I was using bridge on a Rockford P300 and blew my - using-bridge-rockford-p300-blew-peeu4x5nsxvd53n2rwetiqa4-3-0.jpg

Posted on Dec 19, 2014

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Its not only possible, but probable that when your speakers blew (read shorted) that your output mosfets also burnt up. Sorry.

no internal fuse.

Posted on May 24, 2011

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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.
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It has an A and B channel for spkrs and i have one spkr bridged. do i split the neg to side a and pos to side b or just use one of the channels?


Could you elaborate on how the speaker is bridged?

I think you want to hook up a single speaker to a stereo speaker output.

In this case, you would strap (bridge?) the right and left speaker terminals by running a short wire from A right negative to A left negative. Then strap A right positive to A left positive -- this will give you mono output on either of the right or left speaker terminals -- connect your speaker to either one of these.

Do you know what the ohm rating is for the speaker outs on the amp and also the speaker itself?

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Two terminals? bridging theory?


Hello again jm129852,

Having two power and ground terminals allows you to run two smaller wires instead of one big one. It's a convenience. No, you do not have to use them both. They are connected together inside. Yes, you should still use a single fused battery lead. Connect the big wire and fuse holder to the battery and to a distribution block and run the smaller wires from the output side of the distribution block.

When you connect the outputs of a two channel amp to two separate speakers, each speaker gets the power produced by it's channel only. If you are using only one speaker, and the amp is rated to operate bridged, then the speaker will receive the power from both channels, typically twice as much. You do need to be careful when using bridged mode because many amps will only operate safely at a higher impedance when bridged. For example, when operated with both channels connected to separate speakers (not bridged), it may be stable to 2 ohms. But when you connect both channels together (bridged), it is only stable to 4 ohms. Usually, the specifications will tell you the lowest impedance at which the amp should be operated. The specifications for the current RF Punch 500.2 are like this: 125 watts X 2 at 4 ohms; 250 watts X 2 at 2 ohms; 500 watts X 1 bridged at 4 ohms (4 ohm stable in bridged mode). You would NOT want to connect two 4 ohm subs in parallel to this amp in bridged mode. It would result in a final 2 ohm load and the amp would overheat and fail. One 4 ohm sub would be OK, and it would receive the full 500 watts as stated in the specifications. You could connect four 4 ohm subs, two each in parallel to each channel, and the 2 ohm loads on each channel would be OK. Or you could series two of them together for an 8 ohm load, do the same with the other two, and then parallel the two 8 ohm loads for a final impedance of 4 ohms and connect them into the bridged terminals. With DVC subs the connection possibilities get more complex. There are many good impedance calculators online that can help you determine the best wiring solution for various amp/sub combinations. I like the one above at the12v.com web site. Rockford-Fosgate also has one which allow you to select the a number of subs (up to 4), their voice coil configuration (single or dual), and the voice coil impedance. The RF calculator then shows you what configurations are available and what your final load impedance will be.

Hope this helps.

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1 Answer

Not a problem just a question


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  • 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 schematic is available from Rockford.

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