Stereo to Mono Converter Based on FET Circuit Diagram
SPLITMix4 – Four Channel Passive Splitter/Mixer – ART Pro Audio
Why are two 1 kΩ resistors used for this additive stereo to mono conversion? (For audio inputs to an amplifier) - Electrical Engineering Stack Exchange
How to...Connecting stereo outputs to mono input
Stereo to mono summing circuit? - Techtalk Speaker Building, Audio, Video Discussion Forum
Amazon.com: Maker Hart LOOP MIXER - Portable Audio Mixer with 5 Channel stereo inputs, 3 Outputs via 3.5mm jack. Including a Mono to Stereo DM2S Adapter. : Musical Instruments
Q. How do I create a stereo mix from mono material?
JE Labs: Stereo > Mono Line Level Mixer - ***Revised 4/12/21***