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Old 12-11-2011, 06:24 PM
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Help wiring aftermarket subs+amp into stock 2012 srt8 radio

So i got a 2012 SRT with the upgraded HK performance, nothing great stock sub and what not. Pretty much the same stuff the overland and other units come with, so how did you guys go about wiring aftermarket subs and amps to your trucks? My local shop wired the subs and amp to the factory subwoofer and it sounded great but after a week n half the speakers all cut out and the subs cut out, after un hooking everything it all worked just fine again.

So my question is right now they are using a digital clock converter to get the signa, they are thinking we should use a Line out converter and get the signal BEFORE the factory amplifier instead of after it (like how its done right now) and get the signal from the back speaker wire. Will this work? Any input would really be appreciated.

Thanks guys!


EDIT: also currently the shop put in something called a Clock-D (digital converter) its wired to the stock sub after the stock amp, now they're thinking a LOC will work better and stop it frmo cutting out like it did randomly.
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Old 12-11-2011, 08:42 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Yes use a line output converter (i use the PAC brand and have never had issues with them) but any line output converter will work. The converter has to go before the factory amplifier of you will get "noise" or interference if you wire it after the amplifier. Probably what had happened was when your shop wired it after the amp the amp over time wore the converter out and ultimately ruined it. You can wire it to one speaker input if you like (you will get a mono signal) but who cares if you only have one sub there will be no left and right (stereo) output from the sub. If you plan on doing two subs and want left and right signal use both left and right speaker wires to wire the loc to. If you have any other questions please ask! Theres nothing like frying stock audio equipment bc it can fry a lot of other stuff too!! Good luck!
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Old 12-11-2011, 10:26 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Bass notes are so non-directional that you can't hear where they're coming from anyway. It makes absolutely no difference. A good SQ system will have you being entirely unable to "see" where the bass is coming from. It should just, exist. Even though the subs are behind you, you should hear it as if its coming in front of you. Stereo in that regard for subs is useless. You won't hear a difference.
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Old 12-11-2011, 11:57 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Quote:
Originally Posted by frog_a_lot View Post
Bass notes are so non-directional that you can't hear where they're coming from anyway. It makes absolutely no difference. A good SQ system will have you being entirely unable to "see" where the bass is coming from. It should just, exist. Even though the subs are behind you, you should hear it as if its coming in front of you. Stereo in that regard for subs is useless. You won't hear a difference.

What?...
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Old 12-12-2011, 12:03 AM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Was in response to this comment by stacked73

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Originally Posted by stacked73 View Post
You can wire it to one speaker input if you like (you will get a mono signal) but who cares if you only have one sub there will be no left and right (stereo) output from the sub. If you plan on doing two subs and want left and right signal use both left and right speaker wires to wire the loc to.
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Old 12-12-2011, 01:34 AM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Oh ok, thank you, I will do the LOC tomorrow guys from what I've read that's the way to go with the Jeeps (a lot of people are using the PAC module, which is a LOC anyways so the shop has one for me tomorrow).
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Old 12-12-2011, 05:55 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

I'm pretty sure the LOC goes after the amplifier not before. I think the amplifier and mygig communicate with a digital signal and you can't grab the signal before the amplifier. If you are grabbing the signal with a LOC at the speaker terminal, you are grabbing the amplified output of the amplifier.
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Old 12-12-2011, 09:13 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Quote:
Originally Posted by frog_a_lot View Post
Bass notes are so non-directional that you can't hear where they're coming from anyway. It makes absolutely no difference. A good SQ system will have you being entirely unable to "see" where the bass is coming from. It should just, exist. Even though the subs are behind you, you should hear it as if its coming in front of you. Stereo in that regard for subs is useless. You won't hear a difference.

What does this have to do with what i said? I didnt recommend a location for the subs?! I do however diasgree with the "stereo" comment. Some songs (especially rap) can have left and right differences and Just like in home theater if you want a left and a right then there needs to be a left and right signal. Just an fyi
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Old 12-12-2011, 09:30 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Quote:
Originally Posted by stacked73 View Post
What does this have to do with what i said? I didnt recommend a location for the subs?! I do however diasgree with the "stereo" comment. Some songs (especially rap) can have left and right differences and Just like in home theater if you want a left and a right then there needs to be a left and right signal. Just an fyi
Without going too offtopic, my comment also goes for home stereos. Where you should use mono output for subs not stereo. Since bass is created by bouncing sound around a volume (the room or the cabin in a car) it means you can't actually hear where it is coming from, which makes stereo pointless. Stereo subs will also interfere with each other.

an interesting read on the topic - http://www.nousaine.com/pdfs/Stereo%20Bass.pdf

Anyways back on topic..
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Old 12-13-2011, 01:55 AM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Ok so in sum the experiment resulted in listeners not being able to locate the subwoofer lication at levels lower than 80 hz which is closer to the midrange frequency so touche my friend. But the graphs prove your theory wrong about sub placement but i cannot say i told you so bc i never mentioned placement hut that article is more for home than car. Nice read tho!
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Old 12-13-2011, 09:21 AM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

If your only doing a sub then yes a line out converter should work fine. It should be as simple as cutting the OEM connector off the sub output connector by the factory sub and wiring a LOC. If you plan on replacing door speakers then you'd need to do a 6 or 8 channel line converter, suming the channels after the factory amp to create a full signal audio source. If I am not mistaken, you can not grab ALL the channels before the factory amp, this system is a CAN-BUS operation to the AMP, you don't have 6 or 7 different channels going from the radio to the amp, the amp breaks them into the the individual channels therefore if you want to do doors and such one day you'd need a much more sophisticated line converter.

Check out this thread for some wiring tidbits-

http://jeepgarage.org/showthread.php...ing+schematics
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Old 12-15-2011, 12:25 PM
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Re: Help wiring aftermarket subs+amp into stock 2012 srt8 radio

Ok well still do I grab the signal from behing the head unit (before the amp) or anywhere after the amp? Because I'm reading so many different opinions on the internet some saying to grab it before and after.

I was grabbing them after the amp from the factory sub recently with a digital converter and it made the entire rear channel (all rear speakers and subs) to go out one day after a couple of weeks. Then when disconnecting the digital converter from the truck it all came back to life after about 20 minutes. Now my shop is saying my truck needs a LOC and not the digital converter they put in (they're refunding the money on that), but we're still not sure where to wire it with the Wk2 stereo system.
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