HelixNet Main Stations accept linking as well as two-wire and four-wire optional interface modules, offering seamless connectivity to LAN and virtually all common two-wire and four-wire audio systems.

The HLI-4W2 Interface Module provides an easy way to interface common four-wire audio paths such as matrix ports, cameras, and telephone circuits with a HelixNet Main Station. Each of the two ports employ both transformer and electrical balancing to ensure incoming and outgoing audio paths are free of hum and noise.

• Dimensions: 7.36" x 2.24" x 1.54" (187mm x 57mm x 39mm)
• Weight: 13oz (0.35kg)
• Connectors: Intercom Line: (2) RJ-45 (Ethercon)
• Four-wire Option Module Inputs
  
  • Maximum Level Before Clipping: 18dBu
  • Nominal Input Level: 0dBu (selectable)
  • Input Impedance: >= 10K ohms
  • The following specified for a route to four-wire output at 0dBu out:
  • Frequency Response: 20Hz - 10kHz +/-3dB
  • Distortion: <0.2% THD @ 1kHz
  • Noise: <-65dBu
• Four-wire Option Module Outputs
  
  • Maximum Level Before Clipping: 18dBu
  • Nominal Output Level: 0dBu (selectable)
  • Output Impedance: <= 100 ohms
  • The following specified for a route from a dynamic headset:
  • Frequency Response: 300 Hz - 12 kHz +/-3dB
  • Distortion: <0.1% THD @ 1 kHz
  • Noise: <-55dBu