Question about Harman Kardon DPR 1005 Receiver

3 Answers

Hey, my HK Dpr 1005 is a few years old now. It has been absolutely awesome. lately the centre channel speaker has had a hissing, static type noise comiing from it... I thought the center channel speaker blew...i went and picked up a new center channel speaker today and hook it up... same problem! Even with the sound turned right down the hissing/static is the same problem. I tried to see if it was my cable box, xbox, bluray, all had the same issues. I checked all the cables... they are fine too. it is just the center channel. When I set it to be 4 channel (all four surr speakers + sub) this hissing is not there... only when the center has a feed to it. The hissing stays the same loudness regardless of the volume of the unit. Have you heard of this before? What can I do? Thanks

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  • jaison_reinh Jun 24, 2009

    i appreciate the last experts prompt response but in my original post I explained what the problem was and the trouble shooting measures I have already taken. He pretty much told me to do what I have already done...so that didn't help...anyone else have any ideas? Thanks.

  • jaison_reinh Jun 24, 2009

    Thanks for your response.



    I understand that electronic equipment can have a hissing noise but I have had this HK DPR 1005 for three years and this has just come up in the last two weeks. The hissing noise is so loud on the center channel that if I have the volume at -42db (my normal listening level) I can't hear anything but the hissing/static noise.



    I have tried all the settings available on the unit and nothing has worked. I have never had a receiver before that one channel has failed on... does this happen???

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  • Master
  • 2,187 Answers

Normally for these sounds, it is unlikely that the speaker would produce the sound since it is just replicating what is fed to it. There could be a device producing

The hissing increases as you increase increases as well correct? IT may be the preamp stage. If is is relatively constant it could be on the power amp. Normally if these two are the problem all speakers would be affected. This may mean that the internal connections going to your center speaker from the amps is faulty.

Posted on Jun 24, 2009

  • Nicolo Carlo Parazo Jun 24, 2009

    Re-posting solution:

    Normally for these sounds, it is unlikely that the speaker would
    produce the sound since it is just replicating what is fed to it. There
    could be a device producing the static around the area of the center speaker. If it is possible to isolate the theater system to rule this one out.

    The hissing increases as you
    increase increases as well correct? IT may be the preamp stage. If is
    is relatively constant it could be on the power amp. Normally if these
    two are the problem all speakers would be affected. This may mean that
    the internal connections going to your center speaker from the amps is
    faulty.

    Thank you


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  • Master
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Hi,

I believe what you are hearing is a signal-to-noise condition caused bythe receiver's electronic circuits. Just about any piece of audioequipment, with few exceptions, will produce some type of randomhissing noise. It's inevitable, electronic devices produce noise, ofsome kind.

Few old receivers have have a switch to change impedance from 4, 6, or 8 ohms. Change in settings might help.

There is a good article :-

http://www.repeater-builder.com/rbtip/buster.html

WE NEED TO FIX THE ELECTROSTATIC SOUND.

Hope i helped you.

Thanks for using "Fixya".

Posted on Jun 24, 2009

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  • Master
  • 1,197 Answers

I would either calibrate it with a DB meter or check your reciever to see what gain your center channel is at..you might need to bring it down from the preset point it picked.
First, try another speaker on the same center channel. Swap it with another of the speakers that seem to be fine. That way you will be able to determine if the problem really is within the amplifier OR the speaker.
From above, you will know if you must repair the receiver OR the speaker connected to the center channel amp.

if its the speaker.... then the tweeter coils are the ones which might ve gone bad....
Test center channel speaker damage by connecting it to front main left or right and playing some stereo music.

Test the receiver center channel out by redirecting center channel audio data to the fronts.

Double-check your physical connections to the center speaker, too - something may be loose.


if all the above methods fails and if u found no problem with ur speakers.... its better u change the receiver....

kindly rate my service ... good luck

Posted on Jun 24, 2009

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