i want to run 2 amps for 2 different jobs

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=85039
Printed Date: May 14, 2025 at 8:42 AM

Topic: i want to run 2 amps for 2 different jobs

Posted By: wildchildbmx6
Subject: i want to run 2 amps for 2 different jobs
Date Posted: November 02, 2006 at 8:30 PM

i want to run 1 for my subs and the other for my speakers. how do i do that without using a Y adaptor. do i need a headunit that can handle the different channels? want to be able to control the subs and speakers seperatly. please guide me in the right direction

Replies:

Posted By: coppellstereo
Date Posted: November 02, 2006 at 8:43 PM

if you are using your stock head unit, you will nead a 'line output converter' for each pair of inputs (channels).

or you will need an amp that can handle 'high level inputs'

or you will need a head unit with subwoofer and speaker RCA outputs

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Posted By: coppellstereo
Date Posted: November 02, 2006 at 8:43 PM

who is going to install this for you?

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Posted By: wildchildbmx6
Date Posted: November 02, 2006 at 8:50 PM

im installing it all. i have a pioneer headunit and im not sure if i have two rca outputs havent looked. i know how to install, ive just nevver installed two amps to do two different things

Posted By: silverado42000
Date Posted: November 02, 2006 at 10:04 PM

if its a newer HU then it most likly has both sub and rear or front outputs, take a look then if im right then just use an rca cable for the subs. then another for the speakers. good luck, hope this helps

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Posted By: rabreedlove
Date Posted: November 03, 2006 at 5:22 AM

Yea! Maybe I can actually contribute something for a change...

To control the speakers/subs separately from the head unit, you'll nead a HU with 3 sets of pre-amp outputs. If you already have a HU with 2 sets of pre-amp outputs, then get an amplifier (if you haven't bought them already) that has a low-level RCA passthrough to send the signal to your sub amp.

You'd send the 4-channel signal from the head unit to the speaker amp with 2 RCA cables and send an RCA cable from the speaker amp to the sub amp.

However, doing this won't give you control over the sub/speakers independently, although you can compensate for it. In my case, I kept my factory in-dash changer and passed the signal to the sub amp through from the speaker amp. My Rockford Fosgate Punch sub amp has a bass controller knob that I installed under the driver's seat that I can use to quickly increase the sub output.

Hope this helps...