ONKYO TX-SR502B 6.1 Channel Home Theater Receiver - BLACK REFURBISHED 75 high current watts per channel (20 Hz to 20,000Hz @ 8 ohms) powers each of 6 surround channels, with Wide Range Amplifier Technology ( WRAT ) Dedicated line-level subwoofer output Audio is routed, with outstanding 3D effects, by built-in Dolby Digital EX, DTS-ES and Dolby Pro Logic II, which emulates sonic performance of AC3 from Pro-Logic sources 7 DSP modes 96kHz/24-bit D/A converters