Question about Rockford Fosgate Punch® 450.2 Car Audio Amplifier

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Every time I connect the amp (punch 450.2) to the battery the fuse blows

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Your amp has a dead short within it somewhere.

Posted on Oct 07, 2010

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1 Answer

Why does my inline fuses keep blowing on a jbl gto 14001 amp


You need to calculate the amount of amps being driven through that fuse + the amount you need to feed the amplifier.
In my Volvo S40 and V70 I had no problems driving an amplifier of the rear power connector, but on my Honda S2000 however I had to create a different connection all the way to the battery line for a smaller amp (connection as in cables, condensers/filters and fuses).

Feb 18, 2016 | JBL Car Audio & Video

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I have a rockford fosgate punch 800 car amp and the problem i seem to be having is everytime i connect my remote wire to my stereo deck and i turn my stereo on it burns the fuse its only when i connect my...


Check the wires at the amp. Make sure that the wires are neatly bundled and clean cut when connecting them, a stray wire may be going under one of the connections from the battery input to the ground input of the amp, there for causing a direct short and blowing the fuse. I am assuming you mean that the amp's fuse is blowing. Get yourself a test light and test the wires for power. battery power?(12V) is always on and remote power(12V) comes on only when the radio is on(it should be the blue wire in color). Then make sure you have a very good ground, I always use the seat belt bolt or car seat bolt(direct to chassis). If you checked all these steps with no luck then the culprit may be your amp.

Jul 22, 2011 | Car Audio & Video

1 Answer

Amp is blowing inline fuse everytime i connect the pos.&neg. wires


Hi thetexster74,
Blowing of fuse indicated of shorted parts inline with the supply voltage. Most common shorted parts is the sound output IC which is mounted in the heatsink. If your handy with electronics, have knowledge in soldering and desoldering technique, pull-out this IC to the board and then try the unit. If the fuse does not blow this time, you must replace this IC and your unit will back to normal again.
Let me know if the symptoms still persist after you've done the above solution.
Hope I helped you.
Thanks for using Fixya.

Jun 02, 2011 | Rockford Fosgate Punch 45 22.5W x 2 Car...

1 Answer

I have a rockford fosgate punch P325.1 subwoofer mono amp that blows a fuse every time i start the car. I have a second pioneer amp but that works with no problems. How can i fix this?


Is it the correct size fuse ? Is it the power fuse or remote ? Either way check your connections going into the amp . Try this hook your other amp to the set of wires for the rockford if that amp has a problem its a wireing problem if not chances are its an interal problem on the rockford . Hope this helps !

Aug 19, 2010 | Rockford Fosgate Punch P325.1 Subwoofer...

1 Answer

Rockford Fosgate Punch P325.1 Amp keeps blowing fuses every time I start the car. What is going on?


well if the amp works with the car off and when you start it the fuse blows then you may have alternator issues use a volt meter to check battery voltage is not above 14.5 volts
if the fuse blows when the amp turns on then most likely you have a shorted output section in the amp.

Mar 18, 2010 | Rockford Fosgate Punch P325.1 Subwoofer...

1 Answer

Power/ Ground Problem. Im running a 6ga Power wire to the battery (approx 6')with a 40amp fuse. The amp turns on, then about 10 seconds later blows the fuse. The ground is the same ga wire and is grounded...


1. Start by undoing your ground.
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.

If it fails to blow a fuse you have a problem with the chassis ground.

If it is a ground issue you can chase down the various ground straps and clean the connections or you can run another ground cable to the chassis (body) ground to the battery to reestablish the connection.

Feb 10, 2010 | Rockford Fosgate Punch 201S Car Audio...

1 Answer

I have a rockford fosgate 550 that the fuse blows


Short inside one of the transistors. This requires very good soldring skills and electrical know-how, and some thermal paste to go between the heat-sink and the transistor. Unfortunatly this is not a cheap repair, probably cost around 100 dollars.

Cheers,

Kevin

Feb 09, 2010 | Rockford Fosgate Punch P550.2 2-Channel...

1 Answer

Help


If your power cord starts to melt before the fuse blows it means you have *way* too thin power cables. Then the fuse probably blew because of a short to ground due to the melted insulation. This is one of the things that can start car fires.

I use cables of similar thickness as jumper cables to my slightly bigger amp, maybe a little overkill but better safe than sorry.

Good luck!

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1 Answer

Amp problem


you either have a bad ground or your power line is too small, the farther you go from the battery the larger wire you need.

Dec 18, 2007 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Blown fuses


I used to have one of those amps also (nice amp btw) Did you try another fuse of the same size?
Is it blowing fuses everytime you put one in or did it just blow that one fuse ?
Is the conection on the battery solid and clean of corrosion build up? Because that is a good amp and if wired properly shouldnt blow out or anything and so if the speaker is not blown then maybe connection is weak somewhere? I would try disconnecting the speakers from it and try a new fuse and if it does not blow the new fuse than amp is ok? and if it does blow the new fuse right away then there must be a short somewhere in the wire or the amp. then disconnect the fuse again and reconnect the speakers and if the fuse blows with the speakers connected but doesnt blow with them disconnected then you know it is a blown speaker causing the problem.

Just currious but what size fuse do you have connected at the battery?

Jan 06, 2007 | Rockford Fosgate Punch P4004 Car Audio...

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