7055-C or 7055-B?
Posted: June 8th, 2024, 1:06 am
I am getting an intermittent, low-level “chuffing" sound, a sort of fast and steady "shh-shh-shh" noise, from my computer through my speakers (iMac>Denafrips Iris DDC>Denafrips Pontus DAC>Eastern Electric preamp>Meridian power amp>Harbeth speakers). Sometimes it happens when my audio system is first switched on, and then it dies away after 5 mins., and on other more bothersome occasions, it occurs only when music is playing and can be terminated by switching the DAC off and on or, more quickly, changing the DAC’s phase setting.
I am currently using a Hifime Hi-speed isolator between the iMac and DDC, and that has definitely improved the situation, because without it there were times when the noise was both invasive and unstoppable without rebooting the computer (other than pulling out the USB cable, of course, from the computer).
Before the Hifime isolator, I tried the Topping HS01 isolator, which had zero affect on the problem.
The Hifime isolator provides 3kV RMS isolation; the Topping one 1kV RMS. The 7055-B provides 5kV RMS, which makes me think it might cure my problem. Do you agree or do you think I would be better buying the lower-noise 7055-C, even though it provides only 1kV RMS isolation between it and my iMac's USB 3.0 socket?
Thank you in advance,
Simon O'M
I am currently using a Hifime Hi-speed isolator between the iMac and DDC, and that has definitely improved the situation, because without it there were times when the noise was both invasive and unstoppable without rebooting the computer (other than pulling out the USB cable, of course, from the computer).
Before the Hifime isolator, I tried the Topping HS01 isolator, which had zero affect on the problem.
The Hifime isolator provides 3kV RMS isolation; the Topping one 1kV RMS. The 7055-B provides 5kV RMS, which makes me think it might cure my problem. Do you agree or do you think I would be better buying the lower-noise 7055-C, even though it provides only 1kV RMS isolation between it and my iMac's USB 3.0 socket?
Thank you in advance,
Simon O'M