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9thgen's Official E-thug
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Discussion Starter #1 (Edited)
Saw someone had a question about this and decided to post this for anyone else who needed the info..

THIS DIY assumes you know how to connect your AMP

Items needed
1 Amp (for your subs) Including the following
[1 power wire, 1 ground wire, 1 remote cable wire, 1 RCA wire]

1 Lineout Converter (speaker level to RCA)

1 Wire Splicing tool

Optional
Wire Diagram of your stock radio harness


STEP 1
Purchase a lineout converter to RCA- pretty much its 4 wires two positives and 2 negatives that come out of a little box with two RCAs... just go to best buy or your local electronics store and tell them you want to hook up a sub to your stock radio and you need a lineout converter to RCA thingy.. theyll hook u up.. should be no more than 20-30 bucks... or find it online cheaper

STEP 2
Buy a Wire Splicing tool (make sure its for small cables 16 gauge and up)

STEP 3
Locate the rear speaker wires on the stock radio harness (behind the radio)... these are the ones you want to tap into
the rear speakers wires on the stock harness for the 2012 civic lx are
Yellow and brown for the driver rear, and Blue and orange for the passenger rear.. (You can confirm this on your specific car by just opening your trunk and taking a look at the wires that connect to your rear speaker...simple enough)....Splice those wires on the stock radio harness behind the radio.... and connect the wires on the lineout converter to it

remember keep negative with negative and positive with positive...if you dont have a meter to let you know.. just check in your trunk under your stock speaker which side is the negative and which side goes to positive..

Now jus plug in your RCAs coming from the AMP to the RCA inputs on the lineout converter

and thats it... your done.. and of course you have to have an amp powering your subwoofer

PS. To give remote turn on power to your amp just connect your remote cable to the remote turn on wire listed on your diagram ) On the 2012 civic LX its the purple wire on the stock radio harness
 

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i will be doing this in a few weeks when i return home from afghanistan. i will take as many pics as possible and post them up for you guys. im running two 12" alpine type R's and a 1,000 watt alpine amp.
 

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1 Lineout Converter (speaker level to RCA)

STEP 1
Purchase a lineout converter to RCA- pretty much its 4 wires two positives and 2 negatives that come out of a little box with two RCAs... just go to best buy or your local electronics store and tell them you want to hook up a sub to your stock radio and you need a lineout converter to RCA thingy.. theyll hook u up.. should be no more than 20-30 bucks... or find it online cheaper

STEP 3
Locate the rear speaker wires on the stock radio harness (behind the radio)... these are the ones you want to tap into
the rear speakers wires on the stock harness for the 2012 civic lx are
Yellow and brown for the driver rear, and Blue and orange for the passenger rear.. (You can confirm this on your specific car by just opening your trunk and taking a look at the wires that connect to your rear speaker...simple enough)....Splice those wires on the stock radio harness behind the radio.... and connect the wires on the lineout converter to it

Now jus plug in your RCAs coming from the AMP to the RCA inputs on the lineout converter
Nice work!

What do you think about this approach?

The converter that I used in section #3 of ( http://www.9thgencivic.com/forum/how-tos-diy-section/4117-diy-jvc-navi-install-lx-pix.html#post54057 ) can be placed in the trunk at the speaker connectors; with the correct pins you could plug right into the factory harness. This will also remove the need to run new RCA cables to the trunk.

Of course, you still be to provide primary and remote power to your amp.
 

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I tried installing subs on my stock radio and you hear a humming sound on your speakers when the radio is on. So I took it out.


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If I were to splice into the rear speakers like Midlife said was possible my rear speakers would still work, correct?
 

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If I were to splice into the rear speakers like Midlife said was possible my rear speakers would still work, correct?
Yes. If u have a factory sub u can just use those speaker wires to do it. That's what I'm about to do. There won't be a need for the factory sub if you're putting in an aftermarket.


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Yes. If u have a factory sub u can just use those speaker wires to do it. That's what I'm about to do. There won't be a need for the factory sub if you're putting in an aftermarket.


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Oh ok. I drive an LX, so I dont have a factory sub, so if I were to splice into the wires running to the stock harnesses to the crappy stock speakers, and run those spliced wires into the high-inputs on my amp, I can power a sub from those and still have my rear speakers functional?
 

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Oh ok. I drive an LX, so I dont have a factory sub, so if I were to splice into the wires running to the stock harnesses to the crappy stock speakers, and run those spliced wires into the high-inputs on my amp, I can power a sub from those and still have my rear speakers functional?
Grab the positive from one and the negative from the other giving you mono sound for the bass.or use a LOC. And bridge the wires on it for a mono bass output.

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For best results - if you have the premium sound system, connect the converter the factory sub wires. This will allow you to control the sub from the radio face. :thumbup:

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For best results - if you have the premium sound system, connect the converter the factory sub wires. This will allow you to control the sub from the radio face. :thumbup:

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He has an LX no premium sound

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