Print Page | Close Window

bridging a 4chan, 1200w 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=94730
Printed Date: May 13, 2025 at 6:47 PM


Topic: bridging a 4chan, 1200w amp

Posted By: ice32
Subject: bridging a 4chan, 1200w amp
Date Posted: June 12, 2007 at 7:45 PM

Hey,

Im new here but the information your site provides is huge, so i thought i might ask a question on how i can bridge my amp, Any help would be greatly appreciated.

Ok, so i have a 1200w max, 4 channel amp, 4x300w, 2ohm stable and it has a bridgeable 4/3/2Channel mode,i also have a 1200w max 300rms 4ohms sub that i want to power with this amp.

i had the idea that i could bridge all 4 channels into one and it would provide the necessary power for my sub, is this correct? if not, does anyone have a suggestion to how i can power my sub off this amp? if it will work, can someone help me out and explain how i can bridge my amp?

Here's a Picture of the bridgeable Terminals, hopefully it helps.

posted_image

(sorry about the img size)
If you need any other information to provide help, just ask plz

Thanks in advance.



Replies:

Posted By: aznboi3644
Date Posted: June 12, 2007 at 8:22 PM
no you can't bridge all four channels to one




Posted By: ice32
Date Posted: June 12, 2007 at 8:29 PM
ok, what can i bridge then?




Posted By: i am an idiot
Date Posted: June 12, 2007 at 8:52 PM
You can bridge channels 1 and 2 into a 4 ohm load and you can bridge channels 3 and 4 into another 4 ohm load. Your only option with this amp and 1 sub is to get a Dual voice coil 4 ohm woofer.

I know your amp says it is 2 ohm stable but that is the minimum load per channel. That translates to 4 ohm bridged.




Posted By: ice32
Date Posted: June 12, 2007 at 9:08 PM
so if that was 4ohms bridged, wouldn't i be able to run 1 single coil 4ohm sub on the bridged channel? or am i misunderstanding?




Posted By: jeffchilcott
Date Posted: June 12, 2007 at 9:37 PM
Please learn that MAX #'s mean nothing.    Your amp is capable of 600 watts (give or take 15%)MAX anyways, by the picture of the fuses you only have 60 amps of draw

what sub/ subs are you trying to hook to this beast?

-------------
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place




Posted By: ice32
Date Posted: June 12, 2007 at 9:45 PM
i'm trying to power a :BN BOSS AUDIO 1200W 12IN SUB WOOFER
MAX:1200w
RMS:300w
OHM:4

says its dual magnet, i'm not too sure what this means.




Posted By: aznboi3644
Date Posted: June 13, 2007 at 1:11 AM
you can either bridge the first two channels to that sub or the rear channels...not all four

That sub is a cheap flea market sub so I'm sure bridging the fronts or rears will be plenty to push that sub




Posted By: ice32
Date Posted: June 13, 2007 at 4:07 AM
Thanks for the info, yeh i know its a cheap sub, strap for cash after my head unit and being my first audio setup, id figure id start small.




Posted By: aznboi3644
Date Posted: June 14, 2007 at 12:53 AM
hey its cool...i started small....180 dollar sub, amp, and sealed box package from Circuit City. Two 10s, sealed box, and 150 watt mono amp pushing 75 watts to each sub....sounded good to me and loud enough at the time




Posted By: ice32
Date Posted: June 14, 2007 at 8:28 AM
so im relatively new to sound systems in cars, and im trying to learn a little more about it, ive got a pioneer 7950UB headunit, a BN BOSS AUDIO 1200W 12IN SUB and a 1200w max, 4 channel amp(refere to ) This link )

and im trying to install it all in my Mitsubishi lancer glxi, i replaced the front 2 speakers and using stock back 2, i purchased a wiring harness for the lancer and used the harness that come with the head unit to wire them together matching wire to wire, i hooked it all up, worked fine for 30mins or so then it would just play for a few secs and go silent, i pulled the speakers out and noticed that the car wiring was back the front then what was on the wiring harness so i thought that all it was is that the speakers where wired up back to front, so i rewired them around the right way, + to + etc, now i turned it back on, sub and amp work fine, the back speakers are 10times louder then the front and all speakers are distorted,

i hope i hav'nt burnt the speakers out, but can anyone offer advice on how i can test the speakers? what else might be wrong etc? im just looking for how i can fix this problem. any help is greatly appreciated

if you need any more info to supply help, please just ask.

btw the front speakers are "PIONEER TS1671 - 6-1/2" 3-Way Speaker 220W Max Power"




Posted By: ice32
Date Posted: June 15, 2007 at 2:57 AM
After more testing its now come down to i get about 5mins of average quality music before no sound plays without the amp, and with the amp about 60seconds before the head unit turns off and then just powers on and off. can anyone offer advice please? im' about to rip my hair out trying to find what the problem is. Even though this is probably a simple issue to fix for you guys.

i have some thoughts about it being that the head unit is over powering the back stock speakers, and under powering the front 2 speakers, but that only explains the back 2 speakers cutting out.

i don't know, i'm stumped, please help.




Posted By: ice32
Date Posted: June 15, 2007 at 9:52 AM
posted_image all of the above happens if you have a flat battery in your car. simplest thing causing the most drama, i never thought to look at the power source first, i checked every wire, but now all works well.





Print Page | Close Window