A on my own Q:
I have determined Bluetooth version of my Z100 Audio Receiver in a following direct measurement.
I loaded my Audio receiver with 24/192 Flac test track, having a bit rate of about 5 MB/s. The Receiver played the track normally.
As far as v.2.1 Bluetooth has the 2.1 Mb/s speed limitation, my receiver is based on Bluetooth v.3.
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