wiring two amplifiers
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=110384
Printed Date: May 05, 2025 at 6:07 AM
Topic: wiring two amplifiers
Posted By: sj2000
Subject: wiring two amplifiers
Date Posted: January 06, 2009 at 12:26 AM
Hi, I am an audio beginner, I am trying to install 2 amplifiers in my car, the problem is that the remote turn on is only one coming from the head unit, so could I use this remote turn on for amplifier A and then splice the cable and connect it to the amplifier b, will it work? thanks.
Replies:
Posted By: kassdog
Date Posted: January 06, 2009 at 12:53 AM
It will be fine. If you really wanted to be safe you can wire up a relay for it but in general you should be fine.
Posted By: CutDog504
Date Posted: January 06, 2009 at 1:40 AM
You should be fine with up to three amps most of the time. Any more than three, you would want to use a relay.
Posted By: nitrob
Date Posted: January 06, 2009 at 6:15 AM
I have three amps wired up in my 07 Dodge Nitro using an active hi/low converter and it works fine. Only problem is that it is a diesel and I am getting some ground loop noise and popping from the subs when it shuts off. I will be replacing the factory in dash with a good quality unit and will get rid of the ground loop problem. I have been installing systems for over 25+ years as a hobby and now run my own car audio shop part time. If it is something you enjoy and want to stay with I recommend attending say maybe a car audio school and also getting your MECP certification.
Posted By: haemphyst
Date Posted: January 06, 2009 at 8:53 AM
I have three amplifiers and two signal processors to the remote lead of my IVA-W205.
Most remote leads are rated at or limited to 200mA or so. Since an amp typically uses WELL below that (on the order of 20mA or thereabouts) you will have no issues whatsoever with 2 amps.
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: sj2000
Date Posted: January 07, 2009 at 8:14 PM
thanks guys for the info
Posted By: sj2000
Date Posted: January 28, 2009 at 11:35 PM
Hi, I am at the last step of my car audio installation, I have 2 amps and will use a dist block(with no fuse), and 2 fuse holders for two power wires and each will run to each amp. Power wire size is 4 Gauge (all), in the manual always says that the fuse will be the last thing to be installed, so how you guys usually install your amp? Are you connect first the power wire from battery to distro and then to the fuse holder with the fuse already taken out and then go to each amp, then ground the wire for each amp? and then connect back the negative cable to the battery and then put in the fuse as the last step? Another question, is the ground wire for each amp could be connected to the negative side of the battery rather ground it to the chassis? thanks.
Posted By: mattb21
Date Posted: January 29, 2009 at 1:43 AM
sj2000 wrote:
Hi, I am at the last step of my car audio installation, I have 2 amps and will use a dist block(with no fuse), and 2 fuse holders for two power wires and each will run to each amp. Power wire size is 4 Gauge (all), in the manual always says that the fuse will be the last thing to be installed, so how you guys usually install your amp? Are you connect first the power wire from battery to distro and then to the fuse holder with the fuse already taken out and then go to each amp, then ground the wire for each amp? and then connect back the negative cable to the battery and then put in the fuse as the last step? Another question, is the ground wire for each amp could be connected to the negative side of the battery rather ground it to the chassis? thanks.
Pretty much just as you said, yes. Make all connections for your amp, RCA's, power wire (non fused), ground, everything else, then last add in the fuse. As far as grounding directly to the battery, it IS possible, but better to run a shorter chassis ground somewhere closer to your amps. But yet again, someone correct me if I am wrong.
Posted By: sj2000
Date Posted: February 04, 2009 at 8:23 PM
Hi, I just finished installing 2 amps, Rockford fosgate P4004(4 ch), and Alpine MRP-M1000(sub amp), has anyone ever used the same amps, how you configure yours? I mean like in RF there are Gain Control, Bass EQ (0 - +18 DB), Crossover(High Pass, All Pass, Low Pass) for front and rear speakers, and Alpine amp has Gain, Bass EQ and LP Filter. COuld you share? thanks.
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