I had purchased the AudioEngine "
D2" spread-spectrum WiFi version (circa 2015), which automatically pairs its transmitter and receiver units.
The D2 has been discontinued but it was advertised as a '24-bit wireless Computer Interface' (@$600/set). Even during the busy evening hours, the WiFi band is known to get very busy but since the D2 uses spread-spectrum to transmit/receive the digital-audio (100ft range), I never experienced much interference or connectivity problems with it. D2's DAC input is said to be a native 24bit/96kHz (95.2kHz) design with a latency of <20mS.
The WiFi (RF spread spectrum) design is quite clever and described as follows:
"The D2 system divides the band between 2405 MHz and 2477 MHz into 37 discrete, 2MHz wide channels. Channels numbered 2 through 38 inclusive are used for system operation. The system scans the spectrum and selects two channels that are 18 channels (or 36 mHz) apart and transmits with 50% of the time on one channel (for example channel 2) and 50% on the other channel (for example channel 20). The system stays on these selected channels until the error detection rate reaches a predetermined level indicating deteriorating RF conditions. The system will then select a cleaner channel for transmission and move there without any drop in audio. In this way the D2 not only maintains it's own audio integrity, but co-exists nicely with other LAN devices."
I recently retired this D2 system from my current audio chain after 6 yrs of continual use and the only design weakness is the rubberized external enclosure treatment which got sticky to the touch as with many other older audio hardware.
I no longer have any use for the AudioEngine D2 and can be made available as a loaner for testing, if the white-hat
@amirm wants to play around with it.