The AD920 Balanced/Unbalanced Interface provides impedance matching and signal conversion between a balanced intercom circuit and an unbalanced intercom circuit. Both channels become audio and light-signal compatible. Power may come from either intercom circuit or from both simultaneously.

This is particularly useful for production crews wanting to use their unbalanced system with a balanced 'house' system. Each circuit to be used will require its own AD920.

There are no user-operated controls. Connection is via clearly marked 3-pin XLR connectors; 1 female, 1 male.

• Supply voltage:
  • 24~30VDC

• Current consumption:
  • 10~15mA

• Impedances:
  • Balanced 600 ohm, Unbalanced 200 ohm

• Trigger voltage (unbalanced side):
  • 8~12VDC

• Trigger tone (balanced side):
  • 20kHz

• Size:
  • 3.70x4.30x2.50in (93.98x109.22x63.5mm)