Originally Posted by joyntman

Hello! This is my first write up on the forum… PURPOSE; To make it MUCH easier for anyone looking to find answers on how to install an aftermarket sub/sub amp to your JK with Infinity system. ASSUMPTIONS; · You are Keeping stock head unit & infinity amp to run all speakers EXCEPT sub. I did this to keep stock appearance · You do not want to invest in an expensive aftermarket harness to add this amp/sub. · Running all new power/ground/remote turn on lead for new sub amp. · It can be difficult to find the following data you need on the following in one place on the forum: i. How/where to connect remote turn on lead wire. ii. How to connect new amp INPUT RCA’s/ line level inputs to stock head unit. (via LOC) iii. Where to run Amp wiring through the firewall. Let’s answer each of these: i. How do you connect a remote turn on lead for your amp (if your amp requires it) a. Notes: i. There is NOT a remote turn on lead on the stock headunit (non mygig) ii. The stock unit uses a CAN BUS system to notify the Infinity amp it is on iii. As a result, your aftermarket amp will be on whenever ignition is on, NOT necessarily coinciding with whether or not your radio is on, since you cannot wire directly to the head unit. iv. VERY IMPORTANT TIME SAVER: if you are going to get an LOC (see ii below to get an audio signal for your amp, GET ONE that provides a remote turn on lead, and save your self all the rest of these steps in b, c below!) b. There are several locations to hook up a remote turn on lead i. cigarette lighter ii. fuse box iii. steering column (this is the one I chose) c. STEERING COLUMN REMOTE TURN ON LEAD CONNECTION WRITE UP: i. Remove lower cover: ii. Remove upper cover: iii. Locate 5 pin plug on left side of steering column: 1. I found it helpful to remove metal brace behind stock amp iv. Unplug connector from steering column v. Pull back existing wire cover and tape: vi. Locate PINK/WHITE wire: this wire is switched with ignition vii. Splice your remote turn on wire from amp to this wire viii. Tape wire, replace wire cover, plug in connector, replace brace, plastic covers. ix. That’s it! (no need to pull dash apart or run wiring all the way to fuse box! ii. How to connect new amp INPUT RCA’s/ line level inputs to stock head unit. (via LOC) a. Notes: i. Stock Headunit (non mygig) does NOT have RCA outputs at all. ii. Need to splice wiring to get audio signal for new amp via LOC (or just straight wiring if your new amp accepts line level inputs-NOT recommended, but doable) iii. LOC=Line output convertor: this device converts speaker wiring into RCA connectors to provide input signal for your subwoofer 1. Scosche and PAC both have nice units. (I picked up a two channel scosche unit from best buy for $26. a. NOTE; as mentioned above, several LOC’s provide a remote turn-on lead to avoid all the steps in roman numeral i. above!!! iv. The location that you connect the LOC to can greatly affect the sound quality coming out of your sub! (see details below) b. WHERE TO CONNECT LOC WRITEUP: (I will refer to wiring diagram below) JK Infinity System Headunit/Infinity Amp wiring diagram: http://tinyurl.com/jkwiringpic i. Wire location A: (on connector from H/U to Infinity AMP OR behind H/U (recommended option) (black plug, and refer to wiring diagram link above) 2. PRO’S a. BEST choice for sound quality. b. easy location to access (under steering column) 3. CON’S a. Need to run long RCA wire from sub to steering column 4. If you want to connect behind head unit, more time involved 5. Location: under steering column on connector between amp and headunit, OR you can tap the line behind head unit a. (refer to wire diagram above for wiring connections) ii. Wire location B: (subwoofer wiring in rear of jeep, OR at amplifier sub out connection) 1. PRO’S a. Easiest Location to tap into b. Short RCA wires & remote turn on wire if you buy appropriate LOC 2. CON’S a. Worst sound quality! b. This signal has been amplified and crossed-over by Infinity Amp, and you may want to choose different crossover points than stock sub! c. I did this. For a sub, sounds good! iii. Wire Location C: Front speaker output on Infinity AMP (white plug, and refer to wiring diagram link above) 1. PRO’S a. Un-“crossed-over” signal to front speakers 2. CON’s a. WHY DO THIS WHEN YOU CAN DO OPTION A above? iii. Where to run the aftermarket AMP power wire through the firewall? a. Notes i. Be sure to use a fused power wire ii. I also put my fusable power wire block INSIDE the vehicle to prevent weather/road grime affecting it iii. There are several locations to choose from, or you can drill your own iv. Be SURE to run your power wire SEPARATE from your remote turn on wire/RCA wires to prevent noise in your sub! b. Keep it simple: i. If you run the power cord along the passenger side of the Jeep to the front passenger footwell, there’s already a grommet that you can pierce with a knife, coat hanger, utility knife (be careful not to cut any existing wires) ii. PICTURE OF FOOTWELL LOCATION: Here are a few Pics of the finished project I hope this helps!

Originally Posted by edshults

Will this work: So here's what I am thinking. I have a switch that says "passenger eject". I am adding subwoofers to round out my system, but really I am not planning on running them all the time. (I got kids man) so does anyone see a problem with me running the remote line from the Line Level Converter to the amp and running the power and ground from the 30 amp switch on the SPOD? That way I can have the bass on when I want and off when I want? But when the ignition is off it will turn off even when left on?

Originally Posted by DunnyBunny

All you really have to do is run the remote wire for the amp to the switch. The remote wire is what turns on the amp. Or I guess run the remote wire from the amp to the spot on the spod that particular switch controls. I don't have an spod so I'm not 100% sure