rack mountable bluetooth audio receiver

Monoprice Stereo Hybrid Tube Amplifier 2019 Edition, 25 Watt With Bluetooth, Wired RCA, Optical, Coaxial, and USB Connections, and Subwoofer Out

Mount-It! Speaker Mount For Wall and Ceiling, Low Profile Heavy Duty, Anti-Theft, Universal For Channel Surround Sound & Satellite Speakers, 2 Mounts

Tivoli Audio Model One AM/FM Radio with Internal Bluetooth Speaker