L-1 AC/DC Mixer
l-1's ac/dc mixer.
this module is no longer available via L-1
description from l-1 himself:
"Mixer has 4 inputs which can be mixed in pairs and all together. Inputs are AC or DC coupled in pairs by switches. Potentiometers attenuate gain, unity gain at the center their range, max gain = 2. So it is amplifying mixer. PCB made for 15mm Alpha pots with clear shaft, so funny 3mm LEDs mounted. I've choose OP270 as summing amplifiers because of their great DC precision and sound quality."