Need Help: Can't recall which hi-end R2R dac had an optional preamp board?

Title says it all. Ive searched here, google and YouTube. Seems it was a coparo on YT

tweak105-03-2022 1:02pm

ohlala Details Discussions Posts This discussion Message User 1,232 posts 05-03-2022 at 01:11pm Copy Comment URL Report Comment Edit Delete MSB?
jjss49 Details Discussions Posts This discussion Message User 6,610 posts 05-03-2022 at 03:17pm Copy Comment URL Report Comment Edit Delete msb chord weiss bricasti totaldac dcs emm all have line preamp/volume control capability (if limited to no add’l analog line inputs, though plenty of digital ones)
lordmelton Details Discussions Posts This discussion Message User 877 posts 05-03-2022 at 03:26pm Copy Comment URL Report Comment Edit Delete I believe it's the Holo Audio Spring with optional real pre-amp board.