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Hookup Subwoofer to Stock Headunit

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Old Jul 25, 2007 | 05:04 PM
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Default Hookup Subwoofer to Stock Headunit

I have been searching throughout the website and google to try to figure out how to hookup my subwoofer to my head unit. I already know where everything else goes i just cant figure out how to get the wire from my amp to connect to my head unit. I read somewhere that there was a piece that i could buy from the dealer, if that is true does anybody have a part number? Please any input would be greatly appreciated.

Thanks,
Zack
Old Jul 25, 2007 | 05:12 PM
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You can purchase a RCA line convertor and wire this into the speaker leads from your head unit, but after I purchased this unit, my buddy told me that I could have just spliced in an RCA line by cutting off the RCA connectors off one side of the patch cable and wire to the speaker leads. I will be trying this tonight to hook up my front speaker channels to my 4 channel amp. Good luck and may your box pound like mine.
Old Jul 25, 2007 | 05:22 PM
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Okay cool, im just throwing this stuff all together now and this might be a dumb question but can i just have my subwoofer hooked up to my amp on the first channel and have nothing on the other three or will it sound wierd?
Old Jul 25, 2007 | 05:28 PM
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You can do that but you will find that your sub will overpower all your other speakers, If you have the room on your amp you should try to wire as many of your speakers you can to your amp to provide clean sound to match your sub.
Old Jul 26, 2007 | 03:32 AM
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I will be trying this tonight to hook up my front speaker channels to my 4 channel amp.
Do not do this... heres why.

The speaker level output from a radio is amplified (8-10 watts) approximately 15 volts A/C. Most amplifiers will only handle a 2 volt input wit ha few that run up to 8 volt max. By adding DOUBLE the maximum input to the amplifier you will blow the input stage opf the amplifier rendering it useless.
The safest thing to do (without cutting any harnesses) is to pick up a male and female radio harness (Scosche model TA02 nad TA02R) and wire them together. Be sure to tap the line output converter (PAC model SNI-35) to the rear speaker wires. Make sure you ground the drain leads (brown wire) on the SNI-35. This is a simple installation and can be preformed in less than an hour.
Old Jul 27, 2007 | 03:58 AM
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There used to be a headunit, I think it was made by Pioneer that had a separate line output for a subwoofer, but it was rated at 15 watts or so. Something like that would have been a perfect replacement for those who have a factory sub, but don't want to lose it with an aftermarket headunit.
Old Jul 28, 2007 | 01:32 AM
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Originally Posted by GROUND_ZERO
I will be trying this tonight to hook up my front speaker channels to my 4 channel amp.
Do not do this... heres why.

The speaker level output from a radio is amplified (8-10 watts) approximately 15 volts A/C. Most amplifiers will only handle a 2 volt input wit ha few that run up to 8 volt max. By adding DOUBLE the maximum input to the amplifier you will blow the input stage opf the amplifier rendering it useless.
The safest thing to do (without cutting any harnesses) is to pick up a male and female radio harness (Scosche model TA02 nad TA02R) and wire them together. Be sure to tap the line output converter (PAC model SNI-35) to the rear speaker wires. Make sure you ground the drain leads (brown wire) on the SNI-35. This is a simple installation and can be preformed in less than an hour.
I don't understand you logic on this, we are talking about hooking up an amp to the stock stereo, you are talking about the line voltage of the signal beening supplied to the amp. Any voltage that would be supplied from the stock deck(about 1 or 2 volts), will be at least half the voltage coming from an aftermarket deck (about 4 volts) that pushes high voltage than the stock deck. If you are worried about the voltage from the stock deck you better not upgrade to an aftermarket deck.
Old Jul 28, 2007 | 02:56 AM
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[/quote]I don't understand you logic on this, we are talking about hooking up an amp to the stock stereo, you are talking about the line voltage of the signal beening supplied to the amp. Any voltage that would be supplied from the stock deck(about 1 or 2 volts), will be at least half the voltage coming from an aftermarket deck (about 4 volts) that pushes high voltage than the stock deck. If you are worried about the voltage from the stock deck you better not upgrade to an aftermarket deck.

They are talking about cutting an RCA and wiring it directly to the speaker (high) level output of the stock radio (using the amplifier within the stock radio). This will in a cense amplify an amplified signal. By using RCA outputs in an aftermarket radio (low level output) you by-pass the internal amplifier within the aftermarket radio. The logic is simple electronic theory.
[/code]
Old Jul 30, 2007 | 08:23 PM
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I have a line converter on my stock headunit and it works fine.

I have a 250.2 Rockford amp to a 12 Kicker comp in a sealed and fiberfilled 2 cu ft box.

My amp came with a wired remote that I mounted to the dash and it gives me a full range to either turn the whole amp off, or run it very low. I also have my amp ONLY wired to the sub b/c its a 2 ch.

anyway, line converters work fine. it comes with six wires so two of them need to be separately grounded. The other four are connected to the speakers (right side / left side)
Old Aug 2, 2007 | 05:38 PM
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i just did this, you need to buy an FM modulator for like $25 at pepboys, that package will come with all you need to do this
Old Aug 2, 2007 | 10:06 PM
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FM Modulator???

You only need that if you are trying to get some type of signal to go through the antenna system (i.e: audio signal from a DVD player.)

To hook up an amp all you need is the harness', an amplifier installation kit and the line output converter.
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