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Old 04-27-2009, 07:09 AM   #1
redDAinteg
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Default Can you run 2 ohm speakers off a 4 ohm amp ?

If I have a 4 channel amp running 4 ohms for the door speakers, can I run 2 ohm (Infinity Kappa 62.9i) speakers off of it no problem ?
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Old 04-27-2009, 07:13 AM   #2
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

MOST 4ch amps are 2ohm stereo stable, i have heard of some 4ohm stereo stable amps, but no in the last 15 years... and those amps were hardcore SQ amps.. think they were mcintosh, maybe wrong... anyways to your question, if you have 6x9's that have 2ohm vc's, and the amp is 2ohm stereo stable, then yes, it is ok, if you have 1 speaker per channel.
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Old 04-27-2009, 07:18 AM   #3
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

I have it running straight off my alpine 9815 for two years now and its fine. I've also installed it with some flea market 4ch amps for people and to this day its still plays fine and nothing wrong with there amps.

Look at the manual for your amp and see if it is capable of it.


You can also check out Infinity's website they also have a answer there for your question.
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Old 04-27-2009, 11:22 AM   #4
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

What is the make/model of the amp?
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Old 04-27-2009, 05:45 PM   #5
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

As mentioned, most 4ch amps are stable to 2 ohms, [in 4ch mode].

As asked, make and model of amp and we can tell for sure. 94
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Old 04-28-2009, 11:38 AM   #6
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

rockford fosgate p400-4
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Old 04-28-2009, 11:44 AM   #7
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

ok thats a 2ohm stereo stable amplifier, i can automatically tell you that without looking it up.
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Old 04-28-2009, 11:48 AM   #8
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

so you can safely comfortably run 1 infinity speaker per channels, as spec'd above..
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Old 04-28-2009, 04:22 PM   #9
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

Rockford Fosgate 4ch amps are stable down to 2 ohms in the 4ch mode and down to 4 ohms in bridged 2ch mode.

So as long as you leave amp in 4ch mode you will be fine with two or four 2 ohm speakers, or a set of 4 ohm and a set of 2 ohm speakers.94
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Old 04-28-2009, 06:00 PM   #10
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

Yes I agree with these guys. You are safe. I used to install a butt load of Fosgate stuff from Best Buy and you have nothing to worry about.
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Old 04-28-2009, 06:38 PM   #11
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Default Re: Can you run 2 ohm speakers off a 4 ohm amp ?

i miss my power 250....
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