bridging my 4 ch amp

MrSo0h0o · Post by **MrSo0h0o** » Thu Jul 21, 2005 5:47 pm

i know it may seem like a noob queston but for some reason i cant think straight and cant figure out how to bridge my 4 ch amp. i have my component set on the front channels and the rear channels are doing nothing. i figured there is a way to bridge it to get max output. i was looking back in my old threads to see if it was discussed but i couldnt find an answer. so this is a typical 4 ch amp set up.

could someone tell me how to wire this bridged so i get full output?

Post by **GlassWolf** » Fri Jul 22, 2005 7:14 am

the amp has to support bridged mode, usually using a switch to invert two of the four channels.

then you use the positive from one left channel, and the negative from the other left channel, and same for the right to get a 2 channel amp.
it should be in the amp's manual

MrSo0h0o · Post by **MrSo0h0o** » Mon May 25, 2009 12:21 am

I know I am bringing up an old thread, but its mine! lol

For some reason I lived with not bridging my 4 channel eclipse amp. Now that I am bassless at the moment, I wanted to find a way to satiate my need for tunes by getting as much as possible out of my components. I am still unsure on how to wire it in bridged mode. I am including a photo of the wiring the manual states, but it really isnt anything that looks the same as what I want to do.

Please advice. Thanks!

Do i wire the the left side components to LEFT CH 1 + and LEFT CH 2 -, right side components to RIGHT CH 1 + and RIGHT CH 2 -???

Ryan from Ohio · Post by **Ryan from Ohio** » Mon May 25, 2009 6:04 am

What amp is it you have?

Will your comps handle the power?

Would this amp be big enough to run your comps and the subs?

?

But in short, if you wire the front like the rear, both channels would be bridged.

MrSo0h0o · Post by **MrSo0h0o** » Mon May 25, 2009 7:39 am

Ryan from Ohio wrote:What amp is it you have?
Will your comps handle the power?
Would this amp be big enough to run your comps and the subs?
?

But in short, if you wire the front like the rear, both channels would be bridged.

The amp is a 4/3/2 ch eclipse EA 3422. Here are the specs:

My components are Diamond Audio CM361's (6.5"):
http://www.diamondaudio.com/PDF/archive ... Manual.pdf
They can handle 120W RMS.

I used to run my components and sub on this one 4 ch amp but it didnt provide enough power.

I dont quite understand what you mean wire the front like the rear? I want to bridge all 4 channels to get 140W x 2 at 4 ohm. I would assume I would need to use a variant of all the channels in my wiring, no?

Ryan from Ohio · Post by **Ryan from Ohio** » Mon May 25, 2009 10:10 am

Ok, the front and rears... Fronts are the top row, rears the bottom. They operate independent to one another- so its like 2 amps in 1 heat sink (sorta).

The bridge you take the Left + and Right -.

The picture showing the different wiring methods. Notice the bottom left schematic. Apply this to the top and you will be at 2 channels.

Your speakers will be fine with the little extra power. But to be safe I would set your amp to run at their maximum RMS with the DMM tuning.

MrSo0h0o · Post by **MrSo0h0o** » Mon May 25, 2009 10:25 am

Ryan from Ohio wrote:Ok, the front and rears... Fronts are the top row, rears the bottom. They operate independent to one another- so its like 2 amps in 1 heat sink (sorta).
The bridge you take the Left + and Right -.
The picture showing the different wiring methods. Notice the bottom left schematic. Apply this to the top and you will be at 2 channels.
Your speakers will be fine with the little extra power. But to be safe I would set your amp to run at their maximum RMS with the DMM tuning.

Thanks Ryan, I was actually doing some searching and found basically what you said to do. I put the + left on the ch1 +, -left on ch2 -, + right on ch3 + and -left on ch4 -. I ended up having to switch my right RCA to the ch 4 RCA input to get stereo sound and now it works very well.

How would I go about setting my amp to run at its maximum RMS with DMM tuning?

Ryan from Ohio · Post by **Ryan from Ohio** » Mon May 25, 2009 11:32 am

I wouldnt go for maximum. I would try to hone in on what your speakers will take.

Just like we told you earlier, you wont hear a difference with 20 WRMS.

But considering your speakers crossover is only a -6dB setup, I wouldnt chance it.

http://www.caraudiocentral.net/forums/s ... php?t=7686

MrSo0h0o · Post by **MrSo0h0o** » Mon May 25, 2009 11:46 am

Ryan from Ohio wrote:I wouldnt go for maximum. I would try to hone in on what your speakers will take.

Just like we told you earlier, you wont hear a difference with 20 WRMS.

But considering your speakers crossover is only a -6dB setup, I wouldnt chance it.

http://www.caraudiocentral.net/forums/s ... php?t=7686

To tune the amp for my components, should I still use the 50-60hz test tone? I was reading somewhere else that for components, a 1khz test tone would be better.

Ryan from Ohio · Post by **Ryan from Ohio** » Mon May 25, 2009 12:02 pm

Thats true. Mikes FAQ reflects a subs point of view.

1 KHz would probably be a good point.

If you need a straight tone let me know I can probably get you one today, email me

[email protected]