Honestly, why?? This thing only handles older lossy formats; who cares how good the DAC is if it's being fed crapped down lossy data? APTx over A2DP has sharply restricted bandwidth. Full stop. All this talk about what is and is not possible in BT v. 5 is irrelevant, as this product supports APTx, max. Moreover, the only real-world BT audio transport that nears required bandwidth for truly good audio quality is Sony's LDAC, and LDAC is only available on a few sony products and on the latest (v8.0 and above) android devices (sorry, Apple), but even then LDAC isn't supported by most audio hardware right now anyway.
Seriously, just get a chromecast audio: it handles 16 and 24 bit lossless audio over wifi, and if you don't like its DAC, you can dump the optical signal straight from the chromecast to a DAC of your choice. Oh, and its 35 bucks.
I love massdrop and I've upped my headphone and headphone amp game considerably with great massdrop products, but this particularly offering is not up to snuff, and massdrop should help users unfamiliar with bluetooth transport and bluetooth audio compression formats to better understand what this device is, and is not, capable of doing.