AIB-1 - Viking Electronics

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Audio Isolation Board, Allows an Isolated Audio Connection Between Two Devices

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Product Details

The AIB-1 is a 1:1 isolation transformer designed to enable coupling between audio circuits. The transformer is mounted on a printed circuit board which is easily wall mounted with included foam tape and screws. Speaker Level, Line Level, and Telecom Station inputs are available on screw terminals, an RCA jack, and a modular jack. The Line Level output is available on screw terminals and an RCA jack.

Uses include: elimination of ground loop hum, interfacing select Viking products to a phone line, interfacing an Avaya IP office “Paging Speaker” extension to a paging system, summing two different audio sources into one audio input, injecting audio into a phone line, and converting a speaker level signal down to a line level signal.


  • Eliminating ground loop hum in paging systems
  • Paging or mass notification sounds on a phone line
  • Strip off talk battery voltage from paging station
  • Consolidating two audio sources into one
  • Daisy chain a paging system speaker output into a second power amplifier’s input


  • Low cost solution
  • Inputs available on screw terminals, RCA jack, and modular jack
  • Outputs available on screw terminals and RCA jack
  • Line Level, Speaker Level, or Telecom Station inputs
  • Line Level output
  • Wall mountable with foam tape and screws
  • Excellent sound quality


  • Dimensions: 2.7” x 2.7” x 1” (69mm x 69mm x 26mm)
  • Shipping Weight: 0.4 lbs (0.18 Kg)
  • Temperature: 32°F to 90°F (0°C to 32°C)
  • Humidity: 5% to 95% non-condensing
  • Frequency Response +/-3dB: 50Hz to 20kHz
  • Insertion loss with 600 Ohm Load: -2dB
  • Winding Ratio: 1:1
  • Input Impedance: 600 Ohms
  • Output Impedance: 600 Ohms
  • Connections: (1) RJ-11 modular jack, (2) RCA jacks, (6) cage clamp screw terminals