Question about Rockford Fosgate Car Audio & Video

# I HOOKED UP A SUB AND AMP IN MY CAR BUT THE SUB SEEMS TO BE MOVING IN A REVERSE POLARITY. IT WORKED FINE IN THE HOUSE HOOKED UP THE SAME WAY.

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Switch the polarity, problem solved...

Posted on Jul 20, 2009

Hi,
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Goodluck!

Posted on Jan 02, 2017

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## Related Questions:

### My boss d1000.2 2 channel amp was working fine..i took it out the car n put it back n.now the power light comes on but it doesnt play

Make sure your power supply isnt crossed, you will still get a power light with reversed polarity. Then ensure the speaker is connected at both ends, on the amp and at the sub.

Aug 07, 2010 | Car Audio & Video

### Locked up sub-woofer cone won't move?

In theory your idea would work, however you risk damaging your amp by reversing polarity and the positive and negative wires from your head unit are low voltage so they wont provide enough current in reverse or normal polarity to free the cone of your sub. but here is something that you can try that is similar in concept.

Take a positive lead from your head unit and wire it to the negative of your sub. Now ground the positive terminal of your sub to the vehicles chassy using a wire. This creates a 12v-14v reversed polarity current that should be strong enough to (POP) the cone so to speak. hope this helps

Sep 26, 2009 | Jl Audio 12W7 Car Subwoofer

### Subwoofer buldging out problem

When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

-----------------------------
For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
---------------------------

Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

May 27, 2009 | Car Audio & Video

### I have a 2600 watt Power Acoustik Gothic Amplifier and two 12 inch MTX 7500 superwoofers. When I go to hook up both the subwoofers, it seems like the subs won't work as well, but when I only hook up one...

look at the speakers, is one jumping out and the other drawing in? If so try this. Hook one speaker up normally, reverse the polarity on th other. Hook it opposite how you hooked the other up. This won't hurt a thing but it may cure the problem. Sometimes the amps get wired up backwards inside. I know for a fact that fosgate does cause mine was.

May 12, 2009 | Car Audio & Video

### My subs sound distorted and dont pound right 2 12in cvr kickers and a kingwood 2 channel amp think its not wired right

Are you sure the polarity is correct on the sub's connectors? This is very important as reversing them will cause the sub to pound inward instead of out. Make sure the wires are thick enough and that the amp's + connector goes to the red(or +) connector on the sub and that the amp is grounded properly to a clean piece of metal on the car's body. This ground wire should also be as short as possible. Also make sure the fine-tuning for the bass level on the amp is adjusted correctly and that the sub's enclosure is the correct specification ie. Ported or sealed, right size, etc.

Mar 09, 2009 | Kicker CVR12 Car Subwoofer

### Amp playing speakers very quietly

it sounds like you have the polarity of the speakers hooked up wrong on one of them, try unhooking the new speakers you added and hook them back up one by one, when the music gets fuzzy then reverse the wires for that speaker, this should cure your problem.

Mar 07, 2009 | Kicker 06ZX750.1 Car Audio Amplifier

### PS1200 Lost Volume/Pound

try reversing the polarity on one end.
hope it helps.
wg

Feb 10, 2008 | Paradigm PS 1200 Speaker

### Subwoofer Output Not Working...

The first thing to try is disconnecting ONE of the two subs. See if you get more bass with a single sub than with both. If you do, re-connect the second subwoofer, but reverse the (+) and (-) wires.

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### Jl subs not powering

Connect each speaker coil one at a time to a square 9 volt battery and watch for the cone to move.

Also try hooking another speaker to your amp just to make sure it isn't in the amp.

You can use a 9 volt battery to test wire polarity also. Hook up the + wire of the speaker to the + terminal of the battery and the - speaker to the - battery terminal. If the speaker moved UP or OUT then the wiring is correct. If it moved IN or DOWN then the + and - wires are backwards on the speaker.

Also if you have two or more speakers hooked together test all the same way while they are hooked to each other. ALL of the speakers need to move in the same direction at the same time.

Clipping causes more speaker damage than anything. "Dirty Power" can happen in good quality amps too. The gain control is to match the voltage between the headunit and the amp. It is NOT a volume or boost knob. If you overdrive the first stage of the amp and then clip it damage will occur to the amp and speakers at some point.

Hope this helps.

Feb 22, 2007 | Jl Audio 12W3 Car Subwoofer

### My deck doesnt not transmit signal to my amp. Is this an rca cable problem

Hi Your problem is almost defenetly that one speaker is hooked up with reversed polarities, making one speaker cancel out some vibrations of the other speaker. So get the wiring phase checked again, its ethier this or a fauly cable. Good luck.

Mar 21, 2006 | Kenwood KDC-MP728 CD Player

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