Single Entry Model Universal Amplifier For Speaker Type Stations AF1000

A versatile single entry model universal amplifier for use with 3, 4, 5, or 6 wire speaker type stations. The AF1000 provides amplification control, signaling, and power circuitry to operate a complete apartment intercom system.Tone and Voice Volume Control, Steady or Warble Call Tone, Warble Entrance Tone, Timed Door Release,Postal Lock Door.