ONKYO TX-SR500 A/V Receiver (Discontinued by Manufacturer) 55 high current watts powers each of 5 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, DTS and just-released Dolby Pro Logic II 7 DSP modes 96kHz/24-bit D/A converters