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Bavarian Soundwerks' Mobile Electronics Forum
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Old 09-01-2010, 01:42 PM   #1
carmand
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Adding sub - line-level outputs?

I'm installing an amp w. external sub this weekend. I've done this before several times, most recently on my '00 Audi S4. I've ALWAYS used line-level outputs (low level) vs. speaker-level (high level) outputs. My sub amp accepts either (low or high), so its not a show-stopper.

However, tapping into the low level outputs (signal coming from the headunit into the stock amp) as a source, bypasses the existing stock amp and thus provides a cleaner source for the sub amp.

I've looked high and low, and can only find a DIY for tapping into speaker-level outputs - not low level outputs.

Anyone out there know where I can find a wiring diagram or pics?

Thanks!
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Old 09-03-2010, 09:56 PM   #2
radarcontact
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There are lots of wiring diagrams on the forum. I'll see if I can find you a link over the next few days.

I have been asking similar questions about the line voltages. The universal answer seems to be "use the HU leads into an LOC", unless your amp takes differential balanced inputs as even the HU leads (prior to the amp) can put out as much as 11 volts! Few amps do...I thought mine did till a few days ago; they don't. So I'm getting an LOC!
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Old 09-03-2010, 10:04 PM   #3
radarcontact
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Look for a thread I started called "WANTED: Technical...."
I updated my original post with info I found that includes pin outs.

Hope that helps!

(I'd just send you the link but can't figure out how through BimmerApp, which I'm using right now)
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Old 09-06-2010, 12:04 AM   #4
Don-Faheezy
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http://forum.e46fanatics.com/showpos...6&postcount=12

this what you need? its pin 8 16 and 29 37

quick question... how are you tapping into the wires? im going to be installing a sub soon too. u think t taps will be ok?
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Old 09-06-2010, 12:12 AM   #5
howie
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Does ur sub amp not have a switch for high/full/low???
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Old 09-06-2010, 12:58 AM   #6
radarcontact
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Quote:
Originally Posted by Don-Faheezy View Post
http://forum.e46fanatics.com/showpos...6&postcount=12

this what you need? its pin 8 16 and 29 37

quick question... how are you tapping into the wires? im going to be installing a sub soon too. u think t taps will be ok?
If ur gonna tap, try to find some "posi-taps"... They are awesome. NAPA maybe?
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Old 09-06-2010, 07:42 AM   #7
jammykam
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Quote:
Originally Posted by Don-Faheezy View Post
http://forum.e46fanatics.com/showpos...6&postcount=12

this what you need? its pin 8 16 and 29 37

quick question... how are you tapping into the wires? im going to be installing a sub soon too. u think t taps will be ok?
I've used t-taps and they were fine (although I did later solder them in, but only cos I was diagnosing another problem and ruling things out). The the sub install link in my sig.

///Kam
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Old 09-08-2010, 08:18 PM   #8
radarcontact
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I'm just gonna cut 6" on both sides of the amp. If I ever need to "undo" my install, I'll use bullet connectors to put it all back.
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