bridge a head unit
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=59720
Printed Date: April 26, 2024 at 11:57 PM
Topic: bridge a head unit
Posted By: Jmeese
Subject: bridge a head unit
Date Posted: July 19, 2005 at 3:14 PM
Can you bridge a hu from 4 x 22 rms to 2 x 44 rms?
Replies:
Posted By: Poormanq45
Date Posted: July 19, 2005 at 3:26 PM
nope.
YOu'll burn it up.
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Posted By: JAydawg21
Date Posted: July 19, 2005 at 3:27 PM
Nope, unless something says bridagble, it not. All that bridgable means is simplistically, 1 channel, ch.A, drives a speaker with the positive terminal and another channel, ch. B, drives the speaker with the negative terminal. So when bridged you get a bigger potential difference or voltage. Thats not exactly correct but its the easiest way to understand it.
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'97 Jeep Cherokee sport
subs: JL 12w3v2 : RF 500a2 :
RF 1F capacitor
doors: 6" Diamond D361i -> RF 200a4
Posted By: Francious70
Date Posted: July 19, 2005 at 3:42 PM
The rear channels on my HU are bridgable to two ohms.
70 watts x 1 @ 2 ohms.
Pioneer DEH-P7400MP
Paul
Posted By: modena0
Date Posted: July 19, 2005 at 5:51 PM
i think it is moreso crossing the 2 channels, kind of like putting a jumper between Ch.1(-)and Ch.2(+)
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2000 Chevrolet S10
Premier DEH-P860MP
JL Audio XR650-CSi components
Boston 4x6 splits
JL Audio 10W3v2
Alpine MRP-M350
Clarion APA-4162
Posted By: DYohn
Date Posted: July 19, 2005 at 10:03 PM
According to Pioneer's website the DEH-P7400MP HU can be switched so that the rear powered output becomes a mono subwoofer channel. It changes the rear powered stereo amp into a mono amp that is 2-ohm stable and rated at 70 watts peak, so the "bridging" occurs electronically and not through external connections. It looks like each rear speaker output will carry the same signal and it is stable to a net 2-ohm load (4 ohms on each output or 2-ohms on one of them.) I've never even seen nor heard one personally, but it appears to be a nice feature for someone needing a bargain basement front-stereo main set plus sub solution. ------------- Support the12volt.com
Posted By: Francious70
Date Posted: July 20, 2005 at 10:30 AM
Ahh, so on that output you woudn't bridge it, but connect a 2 ohm woofer to either the left or right channel, since it's mono. Gotcha.
Paul
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