Hissing/Clipping in my speakers - AVS Forum
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post #1 of 14 Old 07-10-2013, 08:06 PM - Thread Starter
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Hi Everyone,

I recently just purchased a pair of Ascend Acoustics cbm170 and a Denon 1613 receiver. I play music by airplay with Airfoil. After a few days, I heard hissing sound. It's especially obvious with piano records and classical female vocal, and sometimes the clipping/hissing gets louder as the music gets louder. When I play pop songs, I can't hear the clipping/hissing at all. I tried to connect my iPhone to it by usb, playing the same song, and it had much less hissing. I also tried to listen to the song with my headphone, and it didn't make any hiss.
When I don't play music there's no hissing.

I tried to change my gain to 30%, but it didn't make it any better. I am very confused. Please help me!!
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post #2 of 14 Old 07-10-2013, 08:13 PM
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How do you define clipping? Or associate it with hissing?

How about using a hard connected source, like a cd or dvd? Or is that what you mean when you say you connected your phone, you used a usb connection? How did you try to change your gain?


ps is airplay (sorry, not an appleite) bluetooth? not the best sq that way last I checked...

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post #3 of 14 Old 07-10-2013, 08:19 PM - Thread Starter
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Sorry, I am not entirely sure what the exact sound of clipping sounds like. I think it's hissing. I connected my iphone by usb. The HDMI didn't work on my computer, so I can't connect it.

Airplay is transmitting music by wifi, so it's not as bad as bluetooth.

I listened to the same song with my headphone connected to my PC, which I didn't hear hiss from.
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post #4 of 14 Old 07-10-2013, 08:29 PM
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And the gain adjustment? Could be related, but not sure about your computer/sound card or how it is setup etc, I don't use a computer or wifi for serious video or audio smile.gif

So your computer has hdmi but you can't get it to work? I'd look at that.

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post #5 of 14 Old 07-10-2013, 08:31 PM - Thread Starter
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ok, thank you very much!
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post #6 of 14 Old 07-11-2013, 07:27 AM - Thread Starter
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The problem is still there. I would really appreciate it if more people reply to this post!
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post #7 of 14 Old 07-11-2013, 08:28 AM
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I would try a different source like a real cd player.
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post #8 of 14 Old 07-11-2013, 10:58 AM
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...and explain about your gain structure you brought up earlier. What volume levels are you listening at?

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post #9 of 14 Old 07-11-2013, 11:23 AM - Thread Starter
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I tried to change my gain structure to 30%(used to be 100%), and on my receiver I listened in 45-54, and this volume adjusts as my pc volume changes. if it's really quiet like 30, I won't hear the noise.
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post #10 of 14 Old 07-11-2013, 11:34 AM
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Yes, it could be the source and not the speaker. Try to connect a player via optical cable or coax. That should be the cleanest other than HDMI which may have issues in itself.

Do you have a blu-ray/dvd player? They'll accept CD's.

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post #11 of 14 Old 07-11-2013, 11:39 AM - Thread Starter
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Yes I do. I'll try that
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post #12 of 14 Old 07-11-2013, 07:15 PM - Thread Starter
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Thank you guys very much. I switched to HDMI and the noise is almost gone. I think my speaker has problem handling airplay. Thank you all again!!
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post #13 of 14 Old 07-11-2013, 08:03 PM
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The speaker doesn't care what's fed to it, it's what you're feeding to it somehow. Hissing sometimes comes from amps, but the swing from hissing to clipping (if that's what it was) seems like gain structure so something in your source, the handling of the source in the avr from your wireless connection, or the processing in the avr, or the output from the avr's amp...

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post #14 of 14 Old 07-12-2013, 07:20 AM - Thread Starter
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Yeah, I'll just email Denon. It's definitely the receiver
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