Member of the Trade: WAVE High Fidelity
- Feb 5, 2017
- Leics, UK
when auditioning M Scaler with my Qutest one dealer had a linear battery powered unit called: Musical Paradise MP-U1 USB Linear Power Supply which to my surprise seemed to clean up things a bit compared to using the supplied power unit plugged into the wall socket. Even under their imho too noisy
HI FI shop conditions I could hear a small difference.
I have now been using that unit together with Qutest and M Scaler with its supplied power plug for about a week and charged the battery unit for Qutest over night.
But last night in the middle of Stravinsky's Rite of Spring I ran out of battery power and had to plug in the supplied power unit from Chord to carry on my listening and could actually under very quiet late night conditions hear that some of the effortless natural almost completely noise free delivery from 16/44.1 I was hearing before was not quite there any longer.
Can you elaborate on what you mean by the noise free delivery not being there any more. Could you hear some noise with the stock supply?
I think HIFI News who were the first to mention this possible problem with the supplied unit,were correct in their review of Qutest.
Maybe only some supplied power units are sending noise back into the dac via the mains,but mine does.
Cheers Controversial Christer
I have heard whispers of doubt about the conclusions of HiFi News on this matter so maybe take their conclusions with a pinch of salt.