head unit to amp x2

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=97091
Printed Date: July 21, 2025 at 2:27 PM

Topic: head unit to amp x2

Posted By: audio402
Subject: head unit to amp x2
Date Posted: September 12, 2007 at 5:54 PM

lanzar sd4mu to outboard amps (1) ultralinear 600wx2ch if rca/front out cables are used can headunit still power tweets using speaker wires from hu,speakers audiobahn as65v 100w rms amped.How to add mono amp (2)pioneer d51om 1000 watt to previously described..powering rockport fosgate 2-12 subs ported box,each sub has terminal.On hu is the auto antenna(blue)the amp turn on wire?I'll try to add wiring diagram for hu...But it's strange not to have sub-woofer out posted_image

Replies:

Posted By: stevdart
Date Posted: September 12, 2007 at 9:50 PM

if rca/front out cables are used can headunit still power tweets using speaker wires from hu

Yes. But the tweeters should be crossed over with the mids and powered as a set.

How to add mono amp (2)pioneer d51om 1000 watt to previously described..

Employ a distribution block.

On hu is the auto antenna(blue)the amp turn on wire?

No. If you connect to that wire the amp will only turn on when the radio is on. Does it have a blue/white wire? (...someone correct me if I'm wrong on this one...)

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Posted By: audio402
Date Posted: September 12, 2007 at 10:44 PM

I do have the distribution block..mids and tweets amped audiobahns..I thought i could run another set of tweets off hu,in dash area using front or rear speaker wires ...no good,I guess it was faulty shopping...It does not have the blue/white wire"did you see diagrahm" and if amps only come on when i turn on hu.....i'm coool with that....