how to bridge an 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=83629
Printed Date: May 14, 2025 at 10:19 AM
Topic: how to bridge an amp?
Posted By: witzeln
Subject: how to bridge an amp?
Date Posted: October 03, 2006 at 2:45 AM
how to bridge 1 X amp 2 channel?
Replies:
Posted By: geepherder
Date Posted: October 03, 2006 at 6:09 AM
If you're asking how to bridge any 2 channel amp, it will vary. It must say that the amp is bridgeable in the literature, and many times the bridging terminals are marked on the amp itself.
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My ex once told me I have a perfect face for radio.
Posted By: coppellstereo
Date Posted: October 03, 2006 at 8:38 AM
there will be some indication on one of the positive and one of the negative terminals. They are often connected by a line.
Some amps however are not made to be bridged
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Posted By: witzeln
Date Posted: October 04, 2006 at 1:42 AM
yes, of course the amp is bridgeable. for example, this is the indication: connect (+) terminal of the speaker to the (+) terminal of the first channel and (-) terminal of the speaker to the (-) terminal of the second channel. after then, what will you do to the (-) terminal of the first channel and (+) terminal of the second terminal? are you just going to leave it? or you will connect the two terminal?
Posted By: killer sonata
Date Posted: October 04, 2006 at 2:07 AM
have you been drinking acid rain witzein? go back in the corner and continue to hit yourself. Sorry man, just messin. Not all amps are bridgable as coppellstereo said. Can you give us the model number and brand of the amp?
Posted By: geepherder
Date Posted: October 04, 2006 at 7:55 AM
Witzeln, you're trying to make it more complicated than it is. Connect to the indicated bridging terminals and you're done. The other terminals are unused. ------------- My ex once told me I have a perfect face for radio.
Posted By: stevdart
Date Posted: October 04, 2006 at 9:56 PM
geepherder wrote:
The other terminals are unused.
...and no extra power will leak out. Promise! ------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: witzeln
Date Posted: October 05, 2006 at 12:09 AM
geepherder wrote:
Witzeln, you're trying to make it more complicated than it is. Connect to the indicated bridging terminals and you're done. The other terminals are unused.
tnx! this is the answer I want. what i mean is that the amp has the capacity to be bridge. it is a situation not a statement of fact. tnx! anyway...
Posted By: trini ghost
Date Posted: October 09, 2006 at 10:43 AM
^^^ yes dat is true.....it actually have some amps that dont use "bridge mode technology" if u want to call it that...the ones dat do...will have marked which terminals to use when bridgin and so on....most of the time it will be the extreme right terminal and the extreme left.....one being positive and the other being negative....make sure that yuh make sure to difrentiate yuh wires though because if hooked up wrong then yuh speakers will not play proper...i.e if you mix up the positive with the negative wires...it may cause your speakers to pull in...rather than push out...(i cant remember the term they use to describe this)...i am sure you all know what i'm talkin about
Posted By: DYohn
Date Posted: October 09, 2006 at 11:16 AM
trini ghost wrote:
^^^ yes dat is true.....it actually have some amps that dont use "bridge mode technology" if u want to call it that...the ones dat do...will have marked which terminals to use when bridgin and so on....most of the time it will be the extreme right terminal and the extreme left.....one being positive and the other being negative....make sure that yuh make sure to difrentiate yuh wires though because if hooked up wrong then yuh speakers will not play proper...i.e if you mix up the positive with the negative wires...it may cause your speakers to pull in...rather than push out...(i cant remember the term they use to describe this)...i am sure you all know what i'm talkin about
No, actually I have no idea what you are talking about, and I suspect that neither do you. ------------- Support the12volt.com
Posted By: DYohn
Date Posted: October 09, 2006 at 11:19 AM
witzeln wrote:
how to bridge 1 X amp 2 channel?
Have you read your amplifier owner's manual? What is the make/model of the amp? ------------- Support the12volt.com
Posted By: DYohn
Date Posted: October 09, 2006 at 2:17 PM
A mono amplifier connection has only one "phase." And, if you want to get technical, bridging a stereo amplifier does require one channel to be out of phase with the other. Modern bridgeable amplifiers have an inverter module built-in. ------------- Support the12volt.com
Posted By: trini ghost
Date Posted: October 09, 2006 at 3:51 PM
well i eh know how tuh explain it.....let me see....you know how a 2 channel amp will look like this>>>>>>>>>>> (+) - + ( - ) <---- those are the terminals well yuh takin d ones i put in the brackets and using the posites wire from your subs....and puttin it in ( + ) and use the negative wire from your subs and put it in ( - )...... (well at least that is how i do it usin soundstream amps.....i dont really have much experience with other brands....i'm kinda livin with dat brand a couple of years now....the only other brand amp i experienced other than soundstream is precision power (the old school ones....it was a 6 channel...lol....dats how old school it was) and my cousin uses plenty USAMPS....i never tried them though...as i said ...i only got access to use soundstream
Posted By: trini ghost
Date Posted: October 09, 2006 at 3:53 PM
oh yes....and the term i couldn't have remembered was "out of phase"...as no use for a name said.....thanks....hahaha
Posted By: DYohn
Date Posted: October 09, 2006 at 3:57 PM
Trini: The proper speaker terminals to use for bridging a multi-channel amplifier can vary depending on the amplifier manufacturer, and not all amps are bridgeable. Once a stereo amp has been bridged, it functions as a mono amp and there is only one phase. Connecting multiple speakers to the single output is where it might be possible to have one speaker out of phase with the other. ------------- Support the12volt.com
Posted By: trini ghost
Date Posted: October 09, 2006 at 4:23 PM
^^^^^^DYohn....your absolutely right......because that happened with two of my mid range speakers when i bridged my amp to play them....i have 2 10" 18sound in the back dash and 2 8" 18sound in the front doors....i got molds made for them...and one of the 10's was out of phase when i bridged the 2 channels to play them.....one was movin upwards and the other was moving downwards......you know exactly what i'm talkin bout.. 
Posted By: stevdart
Date Posted: October 11, 2006 at 9:37 PM
reverse polarity = 180 degrees change in phase so...saying "out of phase" is correct. If it's not in phase, it has to be out of phase. ------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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