How to connect two audio devices to one output - Quora
How to properly power your speakers - SoundGuys
How to Combine Two Audio Sources Into One Headphone? - BoomSpeaker
How to power a multi-room music system
How to Use A Speaker Selector for Multi-Room Audio | Audioholics
Our TV Input Tests: Audio Passthrough - RTINGS.com
COOIDEA 3.5mm Stereo Audio Switcher Support 1 In 2 Out or 2 In 1 Out with 3.5mm Audio Cable, 2 Ports AUX Audio Speaker Selector for PC Phone Laptop Headphone: Amazon.co.uk: Electronics & Photo