Yamaha RX-Z9 9.1 Home Theater Surround Sound Receiver (Discontinued by Manufacturer) 9.1 channel, 1,290W powerful surround sound (170W x 7 + 50W x 2) i.Link digital audio interface for SACD/DVD-Audio Heavy-duty rigid chassis symmetric construction with separate chambers and finest parts used throughout High definition Cinema DSP by powerful 32-bit Yamaha LSIs (YSS-930 x 4) Compatibility with latest movie sound formats including Dolby Digital EX, Dolby Pro Logic II, DTS-ES Discrete 6.1, DTS Neo - 6 and DTS 96/24 THX Ultra2 Processing