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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
ellajeanelle's avatar
ellajeanelle
386 posts
 

Try different XLR cables with the units causing the buzz/noise. If that doesn’t fix it, I would suspect your internet connection next. Sometimes they are noisy. Have you tried wired and WIFI to see if it makes a difference (if you have a Wi-Fi receiver) that you can connect to with a short ethernet cable to the rear of you unit?

auronthas OP
79 posts
 

@ellajeanelle Thanks for your hint.

 

I am not sure if this is due to WIFi/Ethernet as my WIFI is always turn on. When I unplug all except E280 and CDP-997, there’s no noise. Even non-ethenet/WIFI equipment like Denafrip Ares II does produce the noise in standby mode.(without playing any music, I am not sure if interconnect XLR or RCA is the culprit?)

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

soix
8,693 posts
 

Does the noise come from both tweeters?  If so it sounds like you have a noise issue somewhere.  Do you have a power conditioner?  Or I guess it’s possible you have blown tweeters.  That’s all I got. 

auronthas OP
79 posts
 

@soix Thanks for your response. Yes, both tweeters when these two (2) units DAC and music streamer are connected. There is no noise when I connected my CD player... can’t be the tweeter issue?! Yes, as my first post stated I am using Novaris Surge Protector/Noise Filter.  
 

Will the iFi Ground Defender help?

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