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Ohm load to powered subwoofer


wuzzzer

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My system consists of a Definitive Technology 15" 'Powerfield 15' powered subwoofer and RF-25 speakers. The subwoofer is using speaker level inputs, as my receiver does not have a subwoofer RCA output.

My receiver does have a 4ohm/8ohm switch. I would like to know if it is safe to run it in 4ohm mode or if it would cause any damage to the subwoofer.

Any help would be awesome! Thanks!

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Shouldn't make any difference. What does Def Tech say it should be?

It is probably set up to place a very small load on the amp through those inputs, so you should have it set for what your main speaker loads are.

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well if things are already running fine in the 8ohm mode, then I don't see the reason for flipping the switch...

As long as you don't crank the reciever, you can do a quick test for yourself and see what changes it makes in the sound. I have a feeling that it might sound a bit louder in the 4ohm mode.

Does your reciever manual have any info in there?

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On 7/18/2005 12:49:04 PM DrWho wrote:

well if things are already running fine in the 8ohm mode, then I don't see the reason for flipping the switch...

Does your reciever manual have any info in there?

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The manual for the receiver just says to switch it to whatever the ohm rating of the speakers are. I don't know where the Def Tech manual is, but I don't remember it saying anything about ohm rating.

I guess I'll probably leave it in the 8ohm setting just to be on the safe side. I just thought the 4ohm setting may give my RF-25s a little more oomph.

Then again, if I end up blowing my Def Tech sub it'll always give me an excuse to upgrade!9.gif9.gif11.gif

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On 7/18/2005 10:44:58 PM wuzzzer wrote:

The manual for the receiver just says to switch it to whatever the ohm rating of the speakers are. I don't know where the Def Tech manual is, but I don't remember it saying anything about ohm rating.

I guess I'll probably leave it in the 8ohm setting just to be on the safe side. I just thought the 4ohm setting may give my RF-25s a little more oomph.

Then again, if I end up blowing my Def Tech sub it'll always give me an excuse to upgrade!
9.gif9.gif11.gif

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That should mean the ohm rating on the RF-25s. As I mentioned, the sub inputs, even using the speaker inputs, will present very little load to the amp.

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