sshhhh sound when playing music - AVS Forum
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post #1 of 10 Old 12-26-2012, 10:04 PM - Thread Starter
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Hi guys and gals.

Its been a long time since i have had a dedicated music/theatre room and since building a new house Ive bought a new Hi-Fi set up and i have a question with regards to a sshhhh noise i can hear in the background whilst playing music. Mainly from the tweeters but i may be wrong.

Can anyone explain the reason for this please?

Im running a Yamaha CD-S700 with a Yamaha A-S700 and Jensen QX-50 speakers. Links for all below.



http://au.yamaha.com/en/products/audio-visual/hifi-components/amps/a-s700__l/?mode=model

http://au.yamaha.com/en/products/audio-visual/hifi-components/cd-players/cd-s700__g/?mode=model

http://www.jensenspeakers.com.au/library/QXbroch-web.pdf

Thank you.
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post #2 of 10 Old 12-27-2012, 06:03 AM
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Your signal to noise ratio is problematic. Unplug everything from your amp except the speakers and select a digital input as the source. Then turn up the volume and see if you hear the hiss.

If you do: you have a problem with your amp (noisy transformer?); if not, the problem is somewhere else in the chain. Start testing one piece at a time.
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post #3 of 10 Old 12-27-2012, 06:17 AM - Thread Starter
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Thank you.

One question though.
If I don't hear the hiss with just the speakers connected and you say to test each piece at a time, how do you mean?
I only have the CD player connected as the source. Do you mean to test this? If do. How?

Thanks.
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post #4 of 10 Old 12-27-2012, 08:05 AM
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Quote:
Originally Posted by kassysimon View Post

Thank you.
One question though.
If I don't hear the hiss with just the speakers connected and you say to test each piece at a time, how do you mean?
I only have the CD player connected as the source. Do you mean to test this? If do. How?
Thanks.

Are you using a digital or analog interconnect between your CD player and your AVR?
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post #5 of 10 Old 12-27-2012, 09:33 AM - Thread Starter
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Analog.

The A-S700 dosnt have a fibre optic option.
RCA only.
And just to be entirely clear. The A-S700 is a stereo integrated amp.

And also an update. I turned on the amp, turned up the volume and switched through every input whilst the CD player which is the only source cimnected to it was switched off (but still connected) and there was no hissing sound.

What do I do now?

How do I test the CD player.

There is nothing else to test is there?

I must admit. I love my stereo but I'm a little behind the eight ball when it come to the technical side of things.

Thanks again.
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post #6 of 10 Old 12-27-2012, 09:46 AM
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You just tested the CD player. There was no noise with it connected but turned off, so the noise is obviously coming from its circuitry.

I would advise you to send the CD player in for repair; I assume it is under warranty.


And also an update. I turned on the amp, turned up the volume and switched through every input whilst the CD player which is the only source connected to it was switched off (but still connected) and there was no hissing sound.
What do I do now?
How do I test the CD player.
There is nothing else to test is there?
I must admit. I love my stereo but I'm a little behind the eight ball when it come to the technical side of things.
Thanks again.[/quote]
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post #7 of 10 Old 12-27-2012, 10:13 AM
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I assume you know that the hiss is not on the CD recording itself (you've played the CD somewhere else and no hiss, or you've tried other CDs and same hiss).

If that's the case: your only two remaining possibilities are the interconnect cable picking up interference and the analog pre-amp inside your CD player.
Likely the latter.

To check the interconnect cable: manipulate the cable (move it with your hand, but don't disconnect it) while something with the hiss is playing and see if there is any change to the hiss volume.
Otherwise it's a problem with the CD player which should be repaired or replaced.

Because I'm a "belt and suspenders" type: If you have access to another source (a friend's CD player for example): you can plug that into the same ports with the same cables and see if the hiss continues or not (it should not: proving the CD player is the problem).

Also (same reason as above): consider physically re positioning the entire ensemble to see if you have an interference issue. Though like the above step: this is over-kill as the issue seems to be the CD-Player itself.
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post #8 of 10 Old 12-28-2012, 02:59 AM - Thread Starter
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I have a Yamaha BD-A1010 that I can test it with.

I'll let you all know tonight.
Thanks again.
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post #9 of 10 Old 12-29-2012, 05:12 AM - Thread Starter
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Seems to be just one particular track.

It fades with the track and I don't notice it in other tracks or other CDs.

Thanks.
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post #10 of 10 Old 12-29-2012, 10:02 AM
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Quote:
Originally Posted by kassysimon View Post

Seems to be just one particular track.
It fades with the track and I don't notice it in other tracks or other CDs.
Then it is in the recording itself. There's no way to remove it (other than performing signal processing on the output: but that will adversely affect sound).

If you love that song, and it bugs you, you can try to find another mastering of it: though I'm guessing it's an older recording (like Louis Armstrong) or something someone transferred from their vinyl or tape.
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