Interesting. Very interesting. Would love a more in-depth elaboration on the special sauce and stage. I only saw one other review of this, it said it's got a bigger stage than usual.

https://www.l7audiolab.com/f/tanchjim-space/
fantastic measurements for a usb dac. very low distortion, excellent linearity, low jitter etc etc this must do a dac. reproduce in fidelity without adding anything, and that's what Tanchjim Space does. if you hear coloration, it's your headphones. otherwise it can be said that what is heard as a difference between other dacs is only distortion and noise because dacs do not play, they convert and reproduce. still great dac for the price. better than some overrated crap like Shanling up5 which has bad measurements for the money.

does your volume button rattle when the device is tapped (not pressed) ?

Nope

Did you try it with an iPhone?, & did you know how many milliwatts it outputs on low gain?

don't have iphone