What cause tweeters hiss ?


I could hear hiss sound when i place my ears close to both tweeters (ATC SCM 11 speaker) when Denafrips Ares II is connected with interconnect (XLR or RCA) during power on/off/standby. Hiss sound disappear only until power cord is disconnected.

At first I thought it’s amplifier (Accuphase E280), then I bypass Ares II and connecting Sony CD player with RCA out to amplifier, no hiss can be heard from tweeters.

Due to curiosity, i connected my Topping D90 with similar arrangement, I could hear hiss sound until I unplugged power cord.

During the above test, music is stopped, amplifier is turned on but at zero volume. All my music source, DAC, amplifier are from the same power source/circuit with Novaris Power Filter.

Can’t hear the hiss at my usual listening spot though.

What could be the culprit that create this hiss, DAC ? Grounding Issue?

 

auronthas

Showing 1 response by pcrhkr

RFI radiated from someware or through the power being supplied can sound like hiss on the output. It is above human hearing so you the hiss might sound as a harmonic. RFI power filter may do the trick. Good grounding will help. I use power isolation transformer with RFI filtering after a Furman RFI power strip. I have no hiss.