Marantz NR1601 Audio/Video 7.1 Channel Surround Receiver (Black) (Discontinued by Manufacturer) Powerfully Capable: Each of the NR1601s seven amplifiers produces 50 watts of continuous power. So you wont run out of steam when your audio sources turn up the heat Marantz M-DAX2 signal processing expand your compressed audio files to supply missing high frequency information. Bluetooth Ready: Just plug in the Marantz RX101 Bluetooth Module (optional) to the NR1601s M-Xport rear-panel jack. Then enjoy a wireless connection  no cable needed between your phone or other portable audio device and your home entertainment system. S/N Ratio: 98dB (IHF-A weighted, Source Direct Mode) Remote Control	Backlight, Learning and Precode System remote