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Please help isolate noise issue with AVR2805

Discussion in 'AV Receivers & Amplifiers' started by anotherdavid, Aug 24, 2005.

  1. anotherdavid

    anotherdavid
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    Hi all

    I have recently noticed moved my equipment and have since noticed a hiss in my speakers when playing some digital sources... I'm pretty sure it's actually inside the AMP, but would appreciate anyone else's thoughts. I have tried to isolate it as follows (driving myself mad in the process!)

    - I first noticed it playing a DVD via coax digital output.

    - I switched the Coax out to Optical but still had the hiss

    - I switched to another DVD Player and still had the hiss

    - If I paused the DVD player I got the hiss, but if I switched the Amp to ext-in, the hiss went away, and if I switched back to digital I didn't have any hiss until i un-paused the DVD (I guess the amp had no signal, so no surprise there)

    If I pulled out the optical cable (while paused) and then plugged it back in, the hiss went away (until I un-paused the DVD)

    I switched to CD connected by Optical and didn't have any hiss. (this is whereI started to get really confused!)

    I then though the Amp might be having trouble with DD or DTS, so i switched the amp to stereo output when playing DVD and still got hiss...

    Sorry for the long post but I would really like some input to help get this sorted.

    cheers David
     
  2. spl23

    spl23
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    If you have a 2805, the Room EQ and tone circuits both generate large amounts of hiss. Make sure tone defeat is set to on, and room EQ is set to off - see if that fixes it. It's difficult to track down with digital inputs as the amp effectively mutes when it isn't seeing a valid bitstream, which kills any hiss immediately.
     
  3. anotherdavid

    anotherdavid
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    thankyou so much spl23

    :clap:

    room eq was set to Front - I set it to Off, and the hiss has all but disappeared!

    funny i never noticed the hiss before, 'cause i've had room eq set to front for a while now..

    anyway, thanks again - very happy now !

    David
     
  4. spl23

    spl23
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    No problem - I had exactly the same issue on my 3805 last week when I turned it up! Spent a good fifteen panic-stricken minutes trying to find the cause...
     

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