https://learn.adafruit.com/four-channel-audio-passive-stereo-mixer/wire-the-jacks
Wire the Jacks | Four Channel Audio Passive Stereo Mixer | Adafruit Learning System
Using audio jacks and potentiometers, you can build a passive mixer to bring together all of your favorite synths.
the jacksfour channel
https://www.thejackshilltopkodai.com/
The Jacks Hilltop Resort Kodaikanal | Stay In Kodaikanal
Experience the best of Kodaikanal with breathtaking valley views, luxury rooms with bathtubs, and premium hilltop hospitality. Book your perfect retreat today.
the jackshilltopresortkodaikanalstay
https://www.jpl.nasa.gov/images/pia13430-checking-on-the-jacks/
Checking on the Jacks | NASA Jet Propulsion Laboratory (JPL)
Workers at NASA's Deep Space Network's Goldstone Deep Space Communications Complex check on a set of jacks used to raise the upper part of the giant 'Mars...
jet propulsion laboratorythe jackscheckingnasajpl