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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 1 response by musicfan2349

musicfan2349's avatar
musicfan2349
207 posts
 

The OP says:

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.

They also say:

FYI, I am using hybrid/Mesh network, Access Point at my listening room then short ethernet cable to my streamer.

Having been through this, I would recommend that you move the AP much further away from your rig and use a longer, good quality cable from it to your streamer. Remember, the mesh node is an RF generator: That’s it’s job right? I found my phono pre-preamp unusable until I moved my AP across the room and ran Cat8 to my streamer. Good luck!

Happy listening.

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