Using speakers with different ohms - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 11 Old 07-15-2019, 08:33 PM - Thread Starter
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Question Using speakers with different ohms

Until I buy new speakers, I'm using a very old Klipsch 5.1 speaker set that runs at 4 ohms with my Denon X4300H receiver. (I manually set the receiver to 4ohms.) After setting everything up I was getting crackling and popping in the center speaker, but kind of randomly. It seems to happen at only certain frequency/volume level combinations.

So, I recently swapped it with a Klipsch RC-42 II just to see if it was the speaker or not and I am still having the same problem. I also just realized it's an 8 ohms speaker. That leaves me with some questions:

1) Is it ok to use speakers with different impedance together?
2) Can you safely run an 8 ohm speaker while the receiver is set to 4 ohms?
3) Since I still get the crackling/popping after replacing the speaker, what else could be causing this? (It only happens on the center channel.)

Appreciate any thoughts/advice on this. Thanks!
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post #2 of 11 Old 07-15-2019, 08:44 PM
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Looks like the issue is from the amp, get it to your local service agent to identify the issue.Using 4 ohms and 8 ohms speakers on an AVR shouldn’t be a problem as long as you calibrate the dB accordingly.


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post #3 of 11 Old 07-15-2019, 08:53 PM
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You should not use the 4ohm setting on the avr at all. Check the owners thread.
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post #4 of 11 Old 07-16-2019, 06:56 PM
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Change it back to 8 ohms to see if it goes away.
If you dont mind... what model #'s are your older Klipsch speakers?

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post #5 of 11 Old 07-17-2019, 07:36 PM - Thread Starter
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Quote:
Originally Posted by B SUBASCHANDRA BOS View Post
Looks like the issue is from the amp, get it to your local service agent to identify the issue.Using 4 ohms and 8 ohms speakers on an AVR shouldn’t be a problem as long as you calibrate the dB accordingly.
By calibrating, do you mean running through the Audyssey setup? I've done that. Or do you mean something else?
Since I'm still getting the crackling on two different speakers, is that why you think there may be an issue with the receiver?
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post #6 of 11 Old 07-17-2019, 07:44 PM - Thread Starter
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You should not use the 4ohm setting on the avr at all. Check the owners thread.
I've been looking through the owner's thread and haven't found anything yet about not using the 4 ohms setting. The manual says that if you're using any speakers with 4 ohms impedance to set it to that. Can you point me in the right direction for info on why not to use that setting? And if that's the recommendation, then I assume that would mean you shouldn't run 4 ohm speakers with this receiver at all then?
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post #7 of 11 Old 07-17-2019, 07:48 PM - Thread Starter
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Originally Posted by WOKNROX View Post
Change it back to 8 ohms to see if it goes away.
If you dont mind... what model #'s are your older Klipsch speakers?
Any risk to the speakers by switching to 8 ohms? These are some ancient Pro Media 5.1 speakers that I really don't even want to be using, but it let me get something up and running while my cash was going to other expenses.
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post #8 of 11 Old 07-17-2019, 08:06 PM
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Quote:
Originally Posted by Dalz View Post
By calibrating, do you mean running through the Audyssey setup? I've done that. Or do you mean something else?

Since I'm still getting the crackling on two different speakers, is that why you think there may be an issue with the receiver?


I mean setting up the decibels according to your speakers by using a sound meter.



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post #9 of 11 Old 07-17-2019, 08:36 PM
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Quote:
Originally Posted by Dalz View Post
I've been looking through the owner's thread and haven't found anything yet about not using the 4 ohms setting. The manual says that if you're using any speakers with 4 ohms impedance to set it to that. Can you point me in the right direction for info on why not to use that setting? And if that's the recommendation, then I assume that would mean you shouldn't run 4 ohm speakers with this receiver at all then?
Sorry, I thought there was a link on that thread...

Here it is:
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post #10 of 11 Old 07-17-2019, 08:45 PM
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Quote:
Originally Posted by Dalz View Post
I've been looking through the owner's thread and haven't found anything yet about not using the 4 ohms setting.
Have a look at this:
https://www.audioholics.com/audio-am...ector-switch-1

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post #11 of 11 Old 07-17-2019, 08:53 PM
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Changing AVR switch to 4-ohms changes the thresholds for triggering the Overload Protect Circuity...which would SHUT DOWN the AVR, with an error display visible on front panel. Set it to 4-ohms if ANY speaker has low Impedance....others can be higher Impedance with no problem, cuz they draw fewer amps.

Could be a stray Center Speaker wire Short...or the AVR.

You might want to try connecting a different (8-ohm?) speaker to AVR's Center Channel...using same AND then different wires to see if THAT is the problem.

Last edited by holl_ands; 07-17-2019 at 09:00 PM.
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