Pioneer VSX-521-K Home theater receiver with 3D-ready HDMI switching at Crutchfield
Amazon.com: Remote Control Replacement Compatible for Pioneer VSX-520 AXD7622 VSX-522-K VSX-823-K VSX-921-K Home Theater AV Audio/Video Receiver AV System : Electronics
Pioneer VSX-520-K User's Manual : Free Download, Borrow, and Streaming : Internet Archive
Amazon.com: Replacement Remote Control Fit for Pioneer AXD7741 AXD7395 VSX-503-K VSX-531-K VSX-530-K VSX-531 5.1 Channel AV Receiver Home Theater System : Electronics