Rockford Fosgate p-450.4 Car Audio Amplifier - Answered Questions & Fixed issues

are u sure u have them running at the right ohms, for not only the subs but the amp too...if you go lower than your amp is rated you can fry stuff...via protect mode......hopefully this helps

dont put it there

smell it !

Check your ground. At the battery check for oxidation, check your RCA's and make sure they are tight. It's usually something that's loose or rusted/corroded. If you still have noise, post a comment with car make model and year as well as audio products installed and I can help you troubleshoot further. Hope this helps.

Hi try http://www.alliedelec.com , they are based in the states and will ship. Not sure if what you are looking for is generic or specific, but they have a pretty good range.
Good luck

Disconnect all speaker wires from the speaker terminals of the amp and disconnect the RCAs. Replace the 30 amp fuse with a 15 amp fuse. If you turn it on and it blows the fuse, it's likely that it has shorted output transistors. If that's the case, you need to have the amp repaired.

The amplifier probably has shorted output transistors.

Disconnect the speakers and RCA cables. Replace the fuses with two 10 amp fuses or a single 20 amp fuse. If the amp blows the fuse when it powers up, the outputs are almost certainly the problem. Don't try it with the two 30 amp fuses. The smaller fuses will provide more protection for the power supply. If the amp powers up with the smaller fuses and they don't blow, check the speakers and the wiring (for shorts to ground or shorts between wires).

Recheck wining setup for proper connection

Internal or external short. Disconnect everything but power, does it still blow? If it does, you need to take it in for repair..

Hello a_brake11,

The P325.1 is relatively small to power a pair of P3's. You'll only get 325 watts RMS at 2 ohms (162.5 watts per sub). The P3's power range is from 100-500 watts, so they will work, but don't expect them to be really loud.

For best power, your subs should be wired with the voice coils in series and then the 2 subs paralleled to the amp resulting in a 2 ohm load.

Hope this helps.

https://www.modifiedlife.com/2006-nissan-sentra-car-stereo-wiring-guide/ the link above might help. Good Luck.

First off will the fastener turn ? If not try using a bit of wd-40 and letting it "soak" for a little while . Also be sure you are using a good proper sized Phillips screwdriver . If the fastener still won't turn try using a can of "computer duster " inverted so the liquid comes out , note this will be well below zero degrees , and freeze the screw head , then try turning . If the fastener is stripped and the ttol slips you will have to remove the amp cover and grip it with a pair of vise grips ,pliers or a flat blade screw driver .

You may not have enough ground connection or your are running too much power for your amp

Yes. Wire the two 2 Ohm speakers in series and connect them to one channel. Connect the 4 Ohm speaker into the other channel. This will give you a balanced 4 Ohm load on each channel.

In series, yes

i have a punch 45 but i'm missing the speaker wire connector.... were do i go to get one...

Please be more specific. RF doesn’t share schematics

Check fuses first

You may have a blown speaker. I would check for that.

Internal short