Thanks for that interesting write-up.

Can I ask what age the D-A section is as I thought Ultra-Analog was a company founded in the early 90s (the designer taking his wares away from Apogee to his own company, before later being bought up and absorbed into disappearance by Wadia).

A few top consumer DACs used that chip at the time, like LFD DAC3, Audio Sythesis DAX, Manley Reference Dac, Stax DAC-X1t..

Do you use it today for CD play back at all?