4 Channel Amp Question

Hello all. Hope all is well.

Just a quick question. Say you have a 4 channel amp, stable at 2 ohms. Is it ok to run the front channel at 4 ohm and then the rear channel at 2 ohm? I know the gains will need to be adjusted if its possible. Thanks.


Derek

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Replies (3)

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ttocs on 05/1/2004 03:07:15
I have done it to amps in the past. I had a amp running that way for years infact. Depends on the amp I would imagine.

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dflock on 05/1/2004 08:50:52
OK. It will most likely happen to a Crossfire BMF754, 75w x 4.

I would assume a good competition amp like this should have no issues. But just wanted to double check..

Thanks.

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swez on 05/1/2004 08:55:05
As long as you don't bridge the rear channels and try to run them at 2 ohms, should be fine. You need a 4 ohm load when bridged.

Depending on the amp channel outputs at 2 ohms, you can expect 1.5 - 3.0dB more power in the rear channels. A little gain adjustment on the rear channels should balance the front & rear stage speakers.

NOTE: In rear deck mounted speakers, it is common to obtain a bit more cabin gain effect from the rear speakers. If you cannot get a good balance with gain controls & HU fader, may have to add a few ohms of resistance to rears to get a good balance point.

Swez

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