Available as an assembled Module and as a DIY project.
No info about availability.
4-Channel Stereo-Mixer
This is a simple 4-Channel 2-Bus Stereo-Mixer. It comprises one pot for volume and one center-detended pot for panorama per channel. in the master-section is another pot for the master-volume. a special feature of this mixer are the two bargraph-display. they lit up in red, when the signal level gets too high. this leads to slightly distorted sounds, which sounds rather nice. the display-level can be adjusted on the back of the module using a trimmer per channel.