For use in my 4 walls: Have placed on my living hall beeen old Yamaha amplifiers the unit. Connection via optical output. Following my Fritz box with WPS done in seconds. On the sender requests I could do without. Can thanks DMP capability of IRS410 radio station and my music collection Play the Fritz Media Server. Sound quality is sufficient. The previous model I had yet to hear about RCA connectors on the amplifier, there was an occasional noise. This is now finally history. 100 Punke from me.