Pioneer Launches VSX-531 AVR Pioneer has released the VSX-531 5.1-channel AVR.By RS Staff Published: May 16, 2016 ⋅ Updated: April 15, 2019 Pioneer has released the VSX-531 5.1-channel AVR. Featuring four HDMI inputs and Ultra HD (4K/60p/4:4:4) pass-through with HDCP 2.2, the AVR supports the latest video standards of HDR. Bluetooth connectivity allows many compatible devices to transmit content to the AVR. Pioneer’s Phase Control technology adds synchronized sound to the AVR for a more engaging performance. The VSX-531 comes with an IR remote and is Dolby TrueHD/Dolby Digital/ Dolby Pro Logic II compatible.