Audio Patchbay - 48 point ADC 1/4" mono patch bay
Standard 19" width, non-standard 2-1/8" height unmarked patchbay with 1/4" mono switched ADC connectors. One connector replaced with an unknown jack with an extra switch that closes when plug is inserted. All of the ADC connectors have switch contacts that open when plug is inserted for configuring normalled, half normalled, or open. All grounds (sleeves) can be isolated from each other. Grey cables were removed after photos were taken.