●Maximum practical output (1kHz, 1ch drive) ◎Supports Wi-Fi, Bluetooth®, AirPlay 2, Spotify Connect, and MusicCast multi-room audio. ・Wireless frequency band: 2.4GHz/5GHz. ● Speaker output: 9 (Front L/R, Center, Surround L/R, Extra speaker 1L/R [can be reassigned to presence or zone 2], Extra speaker 2L/R [can be reassigned to surround back, zone 2, bi-amp L/R]).