head unit to amp

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=31480
Printed Date: July 14, 2025 at 4:24 PM

Topic: head unit to amp

Posted By: bp_viper
Subject: head unit to amp
Date Posted: May 02, 2004 at 5:28 PM

i have a 4 channel amp and 2 4 ohm svc subs. will be bridging 4 to get 2 channels each going to 1 sub. what will the ohm load be on the amp? also, since i am powering the subs with the amp should i use the sub outs from the h/u or go front-channels 1 and 2, rear-channels 3 and 4? if i use the sub outs....do i just use a y rca adapter to branch to ch.1/2 and 3/4? or run into ch 1/2 then use a patch rca from 1/2 out- ch 3/4 in? will be using seperate amp to run the fronts and rears fyi.

Replies:

Posted By: DYohn
Date Posted: May 02, 2004 at 6:14 PM

Since each sub is 4-ohms, each bridged amp set will run at 4-ohms. The loading on an amp is determined by the speaker connected to it, not vice cersa. Use the sub-out from your head and a y-cable to send the signal to both sides of the amp. Be sure to properly adjust the input sensitivity (gain).

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Posted By: Ketel22
Date Posted: May 03, 2004 at 1:28 AM

dyohn, wouldnt the patch cables also properly work in his situation?

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Posted By: DYohn
Date Posted: May 03, 2004 at 8:36 AM

If the amp has that capability, yes. What is the amp?

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Posted By: bp_viper
Date Posted: May 03, 2004 at 7:29 PM

amp is a lanzar vibe 438 and has an output for each channel pair- ch 1/2 in and out, ch 3/4 in and out

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