BillG
Major Contributor
Another potential Chromecast Audio replacement, should they ever become completely unobtainable. However, this one supports AirPlay, DLNA, Bluetooth, the ability to play from an attached USB drive, and has an optical output, in addition to having Chromecast Built-in...
https://www.crutchfield.com/S-Rgy58ugalyq/p_543MBXPRE/Russound-MBX-PRE.html
https://www.crutchfield.com/S-Rgy58ugalyq/p_543MBXPRE/Russound-MBX-PRE.html