Bridge 4ch amp to 1 sub

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=12130
Printed Date: May 03, 2024 at 9:54 PM

Topic: Bridge 4ch amp to 1 sub

Posted By: Goldentouch25
Subject: Bridge 4ch amp to 1 sub
Date Posted: April 12, 2003 at 11:49 PM

Hello, I'm a newbie and I recently purchesed a cheap 50 dollar jensen 4 channel amp (LXA-400). There's a built in control on the amp that lets me sellect how many channels to use. I'm using the bridged 2 channel that sends out 150 RMS per channel. I'm only using it on a 10 inch dual voice coil 300RMS sub with peak at 400. Is it possible and safe to bridge the wire on the outside of the amp so that I can hook up 300 to the sub? I know jensen amps suck and are weak so i'm betting it doesn't really send out 150rms per channel. Thanks

Replies:

Posted By: esmith69
Date Posted: April 13, 2003 at 12:59 PM

is the rating for the amp when it's in 2-channel mode, taken at 2 ohms or 4 ohms? And does your sub have dual 4-ohm voice coils? or are they 8 ohm? 2 ohm?

Posted By: Goldentouch25
Date Posted: April 13, 2003 at 6:21 PM

Hello, Thanks for responding, I checked the specs of my amp and it says 2x150 watt RMS bridged into a 4ohm load. And i just checked my speaker again, it's actually 200RMS and 400max, it's 4ohm dual voice coil. Thanks

Posted By: wvsquirrel
Date Posted: April 14, 2003 at 9:06 AM

Whatever you do, do not use both bridged channels on the same DVC sub.

With only 1 4ohm DVC sub, you can wire in parallel to get a 2ohm load on 1 non-bridged channel on the amp. You do not want to run more than 1 channel (includes 1 bridged channel which is technically 2 channels combined into 2) from the amp to a DVC sub or you'll fry the sub.

If you had a sincle 2ohm DVC then you could wire in series for the bridged 4ohm load.

If you had a second 4ohm DVC sub then you could wire them together in parallel/series and achieve the 4ohm load, then bridge.

What's you budget? Are you willing to buy more equipment, or are you wanting to stay with what you've got now?

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com

Posted By: speedwayaudio1
Date Posted: April 14, 2003 at 10:19 PM

if you have a dvc sub run the bridged left side to one coil and the bridged right to the other coil no problem. Jenson does not have enought power to blow out a candle

-------------
Big Dave

Posted By: wvsquirrel
Date Posted: April 14, 2003 at 11:18 PM

It doesn't take much power to split a DVC when you send signals from 2 seperate channels like that. It is possible to run each coil independantly like speedwayaudio said, but it is not recommended. You can get more info on it here

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com