Hi, I'm trying to install a sub and amp in my 2006 ram w/OE head unit. What wires do I have to tap into to get speaker output? Thanks, Chris

If you are replacing the existing door/deck speakers with replacements of the same size and not adding an amplifier, you will be able to use the existing wiring, making note of the positive and negative notation.
Subwoofers, on the other hand, require an amp. There are subs that have an integrated amp in the enclosure, otherwise you will need to buy a separate amp. Connecting the amp to your existing system will highly depend on what outputs your head unit (aka stereo) has. If it has pre-amp outputs, those can be run straight to sub amp. If there are not pre-amp outputs, you may have to buy a "high level" adapter that connects to the same head unit outputs as your speakers.

If you want to upgrade your sound system in your car by adding a sub woofer or speakers powered by an auxiliary amplifier without having to get a new head unit then hopefully this should help you :)

I decided to keep my standard head unit because it looks well in the car, is less likely to attract thieves than a shiny after-market unit and it is a factory upgraded unit anyway and i find it gives pretty good audio quality, it works with the steering wheel controls and has bluetooth and aux-in, so an after-market unit wouldn't offer a substantial upgrade.

Factory head units rarely have RCA or "Low line" outputs which your amplifier will need for it's input signal.
A "Low line converter" is a device which will piggy back your speaker outputs from your head unit and convert them to Low Line RCA outputs for your amplifier

The converter i bought also gives you a "remote wire" output which tells your Amp when the car is on so it doesn't drain your battery, if you get a converter without this option you can just join the remote wire to the Acc circuit of your car, or the 12V circuit with a switch (you will have to remember to turn it off though or your amp will drain your battery)

The methods i used will require an understanding of car/car stereo electrics so just be careful so as not to damage your car or yourself :)

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The amp needs an RCA input to communicate with the head unit. SOLDER the wires that come out of the head unit for the front speakers to the SNI-15, making sure that the polarity and right/left is correct. Do this for the front and rear speakers if you have a 4 channel amp. Cut the wires if you add new speakers and run the new wire from the speakers or sub box directly to the amp, or skin back the wire insulation and tap on if you use the factory speakers :( then plug your RCA cable from the SNI-15 to the input side of the amp. Don't forget that most new cars have their own amp so you might have to locate it and bypass the speakers wires around it. Don't make a mess in case you have to put everything back to factory for resale. You can avoid all this by installing a new/modern head unit with built in RCA outputs for front, rear, and sub woofer. I hope this helps. Ray

Hi, what you want to do is just connect the speaker wires from the head unit straight across to the pre-amp inputs of the amp. If you have a sub, also connect the pre-amp outputs of the head unit to the 2 sub inputs of the amp. Connect the blue wire of the head unit to the turn-on terminal of the amp and connect power wires to both units. May I ask what speakers are you using?

Hi, you can split the preamp RCAs with Ys available everywhere. The amp input impedance shouldn't cause much load on the head unit. Let us know if you have more questions, and thanks for using FixYa.

How do I install a set or a sub to this head unit with only one wire output marked sub,I'm not sure if may amp will play correct.

CLICK HERE for your Owners manual in PDF format
CLICK HERE for your Installation Guide in PDF format

As we agreed in chat - you are going to run your 4 channel amplifier as follows...

Front Channels of amplifier will run left and right independently.
Wire up the left speakers in parallel all + together and all - together.
This will yield a 2 Ohm load.

To the Same with the Right Side speakers - on the FRONT Right channel of the amplifier.

Now you have a 2ohm stereo load on the FRONT channels of your amplifier.

And using the BRIDGED nomenclature on the REAR channels of your amplifier - wire up your 4ohm sub mono.

Here is a crude drawing for a visual



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This one Wire should be for the +. Try connecting the + to the Head Unit and - to a Common Ground. At the Worst, You will Blow the Amp Fuse if not Correct. The Lead from the Head Unit is Only an Off and On from the Ignition. Please Rate My Response! Thanks!

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blue and white wire on a pioneer is usually the power antenna wire, most people use it as the lead for power to turn on the amp that is installed, the amp should be hooked up to the RCA jacks on the back of the player to the input RCA jacks on the amp. then the outputs vary, some amps are bridgable which means that you can hook up one speaker to both output speakers this will almost double the watts to the speakers. you must know which side would be positive and which side negative to set it up like this. also important is it a two or four channel amp. this all matters. if you can provide more info I can assure you the best hookup possible for premium sound.