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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
auronthas OP
79 posts
 

While I am isolating the hissing noise from tweeters from potential components. I am not sure if the Novaris Surge Protector/Noise Filter, is it a good power conditioner?  I recalled I have no such issue with my previous power conditioner of Tacima CS947 (6-outlet) , I upgraded last year to 8-outlet Novaris PP10.


Anyone has experience on the above power filter/conditioner/surge protector and would like to share your thoughts?  Appreciate

carlsbad2's avatar
carlsbad2
1,382 posts
 

The Novaris is a component that should be removed from the system to see if it is causing the noise.  If you need more outlets get a power strip.  Power strips are horrible for sound but use it for troubleshooting.  

To answer your question, I'm not familiar with Novaris but I googled it.  For $299 it isn't a high quality power conditioner. 

Best of luck.

Jerry

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.

audphile1's avatar
audphile1
4,324 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

curiousjim's avatar
curiousjim
4,198 posts
 

@auronthas ,

 I doubt very much that the Aries ll is making the noise, but are you using RCA cables from it to your amp? Does their path cross a power cord or anything metal? If so, try using XLR cables. Is anything plugged into a circuit that has LED lights on it and even worse, a circuit that has a dimmer on those LED lights? Another thought (Ow) try to get the mesh out of the system.  You can buy a 100’ Cat8 cable on Amazon for cheap to try for a test.

All the best.

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