●It is extendable by expansion boards.
*5G WiFi compatiable means users could control our system when your smartphone connected to your router's 5G channel.
* About Spidif Pins, Up2stream Mini/Pro is default as Spdif out. Up2stream Amp/Mono is default as Spdif in. You can switch to Spdif In/Out by ACPWorkbench Tool. The 2 spdif pins are the same funtion, can't change seperately.
*Up2stream Amp SUB and S50 Pro+ Preamp is our coming up new products.