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Old 12-12-2009, 12:32 AM   #1
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Wiring Up An Amplifier ?

Hello.

I´ll get a used amplifier from a friend next week.
How do I wire it up?

Is there a converter that converts the stock TJ raidio speaker signal to a line signal? Or does the stock CD/cassette radio have a line-out signal?

Where at the stock radio do I connect the cable that goes to the amp and turns on the amp?

The amp makes 4x 75 W RMS / 1x 200 W RMA @ 4 Ohm.

What cable diameter do I need to connect the amp to teh battery?
Is it better to connect the - cable to the body or to the battery?

What cable diameter do I need for teh 4 speakers and the subwoofers?

Thanks for your help.
nicolas-eric







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Old 12-12-2009, 12:39 AM   #2
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I´ll get a used amplifier from a friend next week.
How do I wire it up?

Is there a converter that converts the stock TJ raidio speaker signal to a line signal? Or does the stock CD/cassette radio have a line-out signal?

Just get something like this

Amazon.com: PAC SNI15 Line Output Converter for Adding Amplifier: Automotive

Where at the stock radio do I connect the cable that goes to the amp and turns on the amp?

You could just hook it up to something that switches on with the key

The amp makes 4x 75 W RMS / 1x 200 W RMA @ 4 Ohm.

What cable diameter do I need to connect the amp to teh battery?
Is it better to connect the - cable to the body or to the battery?

I've always grounded to the body and never had a problem. Just try to run you audio cables on one side of the jeep and your power cables on the other.

What cable diameter do I need for teh 4 speakers and the subwoofers?

You can buy an amp kit at Best Buy or any stereo shop. It should have everything you need.

Thanks for your help.
nicolas-eric

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Old 12-12-2009, 12:46 AM   #3
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I live in Germany and have to buy the parts here..

Isn´t there a connector at the radio that could activate an automatic extendible antenna? I could use it to turn on the amp.

Where canI find the wires from the soundbar speakers? At thw left or the right side of teh roll bar?
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Old 12-12-2009, 12:03 PM   #4
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1) Buy a "Line Out Converter" which will convert the signal from the existing speaker wires into RCA level inputs. Be sure to get enough LOCs for how ever many signal's you're going to want to have. (Not just right and left, but front and rear too, I'd really consider purchasing a new head unit w/ the pre-outs already there depending on costs)

Hook the LOC's up by tapping into the existing speaker wires, found on the left side of the sport bar under the padding. (take out each speaker to see which color wire is which)

Then, hook up the amp like this

+12V input - run a FUSED wire to the battery with the fuse located under the engine compt. There's a rubber gromment in the firewall on the drivers side that I always use to run wires through. Poke a hole in it and pass the wire through. Be sure to route it and secure it so that it doesn't interfere w/ your gas/clutch/brake pedals or the movement of your steering shaft.

-Ground GND - run the shortest, thickest wire you've got to a SOLID grounding point and be sure to scrape away some of the surrounding paint to get a good contact.

+Remote turn on lead RMT - I don't think the factory head unit has a remote powerlead since we don't have power antenna's, I just tap into a switched source at the glove box. If I remember right, I used the cigar lighter since it goes off when you turn the ignition off.

Hooking up the speakers should be pretty self explanitory.

As far as which guage wire to use for power and ground, I'd use the biggest wire that would fit cleanly into the amp inputs. No need to go crazy, you're not going to be driving that much power, but don't cheap out. The remote wire can be pretty small wire about the same gauge as average speaker wire. As far as the speakers, just don't get the cheap stuff, and I'd try to run a larger wire to the sub.

Sorry, don't have my gauge's memorized.
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Old 12-20-2009, 09:35 PM   #5
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I just bought a High/Low converter that also has a + remote.
SLI 2

I also bought new speakers and a new subwoofer. Way better than the Kicker woofer I wanted before.
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