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Help needed to eliminate unwanted noise from tweeter

Hi all, need your advise to eliminate annoyance "sizzling" noise from speakers' tweeters (close listening range).

I have isolated all the power supply of audio equipment. Then plug in one by one in sequence as following: -

a) Integrated Amplifier - Accuphase E280

b) CD Player - Sony CDP-997 (standby power) - no noise observed from tweeters even my amplifier volume knob is at set to lowest position.

c) DAC - Denafrip Ares II (standby power) - Once I plug in, I could hear the sizzling noise from tweeters when my ear is near speaker.

d) Music streamer - Unplug Ares II, and plug in Eversolo DMP A6, similarly I could hear noise from tweeters.

From the above, could someone pointed me what's wrong with these two (2) units? They are three-prong with ground pin, they are connected to my Novaris Surge Protector multi-gang socket outlet and to wall recepatacle, there's earth/ground continuity.  

Your advise will help me to isolate the 'noise' issue for cleaner auditioning with thanks.

Regards,

Auronthas

auronthas

Showing 3 responses by audphile1

audphile1's avatar
audphile1
4,321 posts
 

Good job!!! Enjoy the newly noise free system!

audphile1's avatar
audphile1
4,321 posts
 

When you have the cd player connected and there’s no noise, is the cd player powered on? If you’re testing it in standby, try to turn it on but don’t play a disc  

The noise you are describing, is it similar to this?

https://youtu.be/ZXtimhT-ff4

audphile1's avatar
audphile1
4,321 posts
 

Does the hiss change with the volume? If you turn up the volume on the amp does the hiss increase? If with cd player powered on and connected to the amp you have no hiss, and you are using the same exact input on the amp as you do with the DAC, then the source of the hiss is your dac.

And yes - use only one output from the dac at a time and see if hiss goes away. It might be less prominent with the RCA connected since the XLR outputs are typically higher voltage. 

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