The "Theatre Quad" speaker system is a surround sound system designed specifically for home cinemas. It is not clear whether it can be connected directly to an AV receiver such as the Sony TA-AN1000, as the primary connection is via HDMI and the Bravia Connect app. Normally, such systems are connected to a TV or other HDMI-enabled device via HDMI. If you want to use an AV receiver, you should check the technical specifications and connection options of the receiver to ensure that it is compatible with the speaker system.