Add a second output to a passive summing mixer | diyAudio
schematics - Making a Simple Audio Mixer - Electrical Engineering Stack Exchange
Simple Stereo Summing Mixer
How to build an audio mixer
Audio Mixer Amplifier by Don Kuenz
How to Build a DIY Passive Summing Box – DIY Recording Equipment
Virtual earth summing with transformer | GroupDIY Audio Forum
XPSum: A new product combining the XPatch with a Analog Summing Mixer — CB Electronics | Specialists in Studio Monitor Controllers, Digitally Controlled Analog Patchbays, Timecode, Remote
Tape Op | DIY summing mixer schematic help - Message Board
New York Dave's Passive Summing Mixer - Mute Switch | diyAudio
Audio Signal Mixing
How to Build a DIY Passive Summing Box – DIY Recording Equipment
How to Build an Audio Mixer - Circuit Basics
A Short Discussion on Summing Busses and Summing Amplifiers By Fred Forssell The summing network in mixing consoles is an easily