4-ch 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=10972
Printed Date: August 07, 2025 at 12:22 AM
Topic: 4-ch Amp
Posted By: rjmartinez
Subject: 4-ch Amp
Date Posted: March 16, 2003 at 10:04 AM
Just out of curiosity, If you have a 4 ch amp and bridge the first 2ch into a sub; couldnt you just bridge the last 2 ch into that sub as well to double the power.
Replies:
Posted By: bberman1
Date Posted: March 16, 2003 at 12:35 PM
Let me better understand your question you want to bridge a 4 channel amp to 1 channel am in correct?
Posted By: dragonrage
Date Posted: March 16, 2003 at 1:27 PM
If bberman is correct in his interpretation: Depending on the construction of the amp, you may be able to put the amplifiers in series. But if all the negatives are common, you will blow the amp if it doesn't have short protection. In general, I'd say not to do this, because it's most likely that the amp will blow. But if you have dual subs or a DVC sub (make sure the signal to both coils is the same, no stereo sh*t to 1 speaker!), then bridge 2 channels for 1 sub and 2 channels for the other sub. Keep in mind that the load doubles for the amp when you bridge it, so run a 4 ohm speaker/coil per 2 channels if the amp is 2-ohm stable (most likely), or an 8 ohm speaker/coil per 2 channels if it is only 4-ohm stable. ------------- 2009 Pontiac G8 in planning stage
HU: ?
Speakers: ?
Amps: ?
Posted By: bberman1
Date Posted: March 16, 2003 at 2:00 PM
If you plan on running 2 separate subs then yes it will work. You can bridge one sub off each channel. But if you’re talking about bridging it down to a total of one channel it will not work. Also you cannot wire one channel to one side of a DVC and the other channel to the other side of the DVC this will damage your DVC sub. So like I said before the only way it will work is if you plan on running 2 separate subs (1) off each bridged channel.
Posted By: dragonrage
Date Posted: March 16, 2003 at 2:46 PM
bberman: if the signals to all the channels are the same, a DVC sub would work fine. I mentioned that in my response...Stupid people use DVC to hook up 1 speaker to a stereo signal, but that is bad. If the signal is the same, it's ok.
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2009 Pontiac G8 in planning stage
HU: ?
Speakers: ?
Amps: ?
Posted By: bberman1
Date Posted: March 16, 2003 at 2:55 PM
You are correct but most likely he has a 4 channel AB class amp. Now on an AB class amp it’s almost impossible to have the same signal going to each voice coil on the sub.
Posted By: rjmartinez
Date Posted: March 16, 2003 at 4:14 PM
Hey Thanks fellows!!! I love to mess with this stuff and I am glad I asked you guys before doing something stupid, lol. (as usual). I was just curious, Ok one more, Do you guys like the idea of one dual voice coil sub hooked up into the amp or just the old fashioned way 2 subs with the channels bridged. (Using 12" Sony explode subs) I AM ON A BUDGET OK! FAMILY MAN! by the way its a SONY EXPLOD 4 channel amp, which I will give to any one for a FOSGATE 500 BD (LMAO)!
Posted By: bberman1
Date Posted: March 16, 2003 at 4:20 PM
I would run it as 2 chanels using 2 subs( one sub on each channel). You cannot run it as a single channel you will blow up the amp!
Posted By: rjmartinez
Date Posted: March 16, 2003 at 4:49 PM
Thanks alot for all the great advice and quick responses! BBERMAN1
Posted By: bberman1
Date Posted: March 16, 2003 at 4:57 PM
Glad to help you hope you enjoy your new configuration
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