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2015 GT base stereo, add 4 channel amp to rear

wjfawb0

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I've spent some time reading here about adding an amplifier to the trunk using line level inputs from the rear speakers. I'd like to run the rear speaker feeds into an 4 channel amplifier (or separate 2 channel and sub amp) that will power the rear deck speakers with a high pass filter and one or two subs in the trunk with low pass filtering.

Can anyone here name any problems I might run into?

I've read about the blue/white power turn on lead signal in the right of the trunk. Has this proven to be reliable (particularly with a push button start car)?

I've read mention of possible high pass filtering on the rear speaker outputs. Any feedback on that?

This all got started when I helped my neighbor completely replace the base stereo in his 2016 jeep wrangler unlimited. We spent two solid days replacing everything in it with a Pioneer NEX4200, maestro, component speakers, and large amp to power them all. We even ran the power, turn on, and preamp cables for the future amp and sub in the rear. The system turned out nice.

My 2015 jeep wrangler has the upgraded Alpine system with the built in sub. It sounds pretty good for a soft top jeep. In fact, it makes my base stereo 2015 GT sound horrible. When I'm listening to music in the mustang, I can barely hear the low end. I've been listening to talk radio and audiobooks mostly in the mustang (highway trip use mainly). I'd like to improve the music playing capabilities.

A little background on me. I was drooling over Crutchfield catalogs in the 90's and installing car stereos when I was a teenager. It's part of what drove me to become an electrical engineer. I've since worked for electronics companies for about 6 years, but I've mainly earned a living working for electrical utilities building high voltage substations for about 15 years.
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Mootang

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I am not good at audio, but I can help with the power on (blue/white) lead signal. Credit goes to another forum member with thread on here who mentioned this. This is located in the passenger side kick panel. I looked for the big green and purple wire. Tested with a voltmeter and it was a perfect on and off accessory. So I tapped it and have no issues since. Have fun and good luck with your install :)


 
 








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