Quote:
Originally Posted by Sharp 1080
Andrew, actually a totally separate issue. The buzzing wasn’t mechanical in nature. One amp was quiet the other wasn’t. I think I know where the problem was. They are focused on other priorities right now. It isn’t a production problem at all.
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That is good to hear. Because after reading Your posts in this thread I started precisely listening to my pair of Progression mono-blocks.  But nothing like Your problem I did find in my pair. The good is that You completely solve Your problem.
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Analog: McIntosh MT10 with SME V tonearm and Van den Hull Colibri XGP Gold MC cartridge which is paired with McIntosh MP1100 phonopreamp;
Digital:modified Mac mini as Roon server with Uptone JS-2 Linear Power Supply which is connected to Berkeley Audio Design Alpha USB with Curious USB cable and then by Transparent Audio 110ohm Premium AES/EBU cable to Berkeley Audio Design Alpha DAC Reference series 2;
BD/SACD/CD player OPPO 205 (which also works as home theatre processor),
Preamp:Dan D’Agostino Progression preamp,
Amplifiers: 2 Dan D’Agostino Progression monoblock power amps,
Speakers: Wilson Audio Alexx,
Power unit: Nordost QBase Qb8 Mark II, QKore 6 earth unit
Audio Cables: Transparent Audio G5 Reference SC and balanced IC, the rest are all G5 Ultra
Power Cables: OMVLabs, Nordost
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