Mytek Manhattan II? using third party measurements

[michiganave]

Disclaimer: I'm a first time poster. I saw there is this nice compilation of SINAD calculations for 3rd party measured amplifiers:
https://www.audiosciencereview.com/...list-for-3rd-party-measured-amplifiers.16060/

But I don't see something similar for DACs?

I have a Mytek Manhattan II and am wondering how it performs to the DACs measured here.

There are measurements by John Atkinson posted here:
https://www.stereophile.com/content...preamplifier-headphone-amplifier-measurements

He commented: "Increasing the bit depth of a dithered 1kHz tone at –90dBFS from 16 to 24 dropped the noise floor by 24dB (fig.13), suggesting a superb resolution of 20 bits, close to the state of the art."

If the effective number of bits is 20, that really would be a state of the art SINAD around 121?

Can somebody help me interpret and estimate a SINAD?

Thanks!

 

[AnalogSteph]

Dynamic range would be somewhere around the 120 dB mark, probably 119-124 dB(A)-ish.... not sure whether the AP SYS-2722 can even go much higher at least when measuring as shown (you're hitting the ADC limits), but a respectable value either way.

Neither a 2 Vrms / 4 Vrms nor a 1 kHz test were performed, so I can only go by the 50 Hz 0 dBFS distortion and estimate that SINAD would have to be at least ~92 dB... at 2/4 Vrms (-8.5 dBFS), perhaps ~100 dB. Apparently the Brooklyn allows the analog gain control to be bypassed, yielding a substantial improvement in 2nd harmonic, and this model seems to have a similar function (it is unclear what settings were for the Stereophile measurements)... regardless, we're talking inaudible vs. even more inaudible.

In terms of digital filters, I would probably be choosing one of the fast rolloff options (FRMP or FRLP). APDZ has a tad too much passband ripple for a linear phase filter, and MQA may be prone to clipping/overflow as it was on the Brooklyn.

I think the 6 grand price tag is warranted only by it being a nifty-looking (and no doubt well-built) combination DAC / streamer / preamp / HPA device that can output +22.7 dBu @ 0 dBFS, thus even integrating into a major studio. Mind you, relatively few things audio electronics costing as much as a decent used car are ever going to qualify as price/performance hits.