solderdude
Grand Contributor
Hi,
The unit differs from the one on your picture:
https://www.audiophonics.fr/fr/dac-sans-volume/audiophonics-u-sabre-desktop-k2m-dac-ampli-casque-24bit96khz-sa9023-es9018-p-11911.html
There is a convenient volume control, that's why I bought it in the first place.
The other condition was to be plug-and-play, as it's for my office where I can't install anything myself if it has to modify Windows registry.
This version does seem to have 2 AD823 output opamps...
Those opamps have a max. load capacitance of 500pF and the ceramic tweeter is probably higher than that.
Depending on which output resistors the circuit has it could still potentially oscillate.
It looks like the Rout is supposed to be 23 Ohm (2x 47 Ohm per opamp as printed on the board).
In any case... the Triple driver OE may be a difficult load to some amps.
No idea how high the capacitance is.
Maybe use the other 2 headphones with this particular DAC ?
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