Sonifex RB-SD1IP
Silence Detection Unit with Ethernet and USB


The Sonifex RB-SD1IP Silence detection unit is an upgraded version of the RB-SD1. The unit is a 1U rack mount device used to monitor an unattended stereo studio feed and in the event of the signal going “quiet” after a given period the unit will switch through an alternative stereo audio signal. This signal could be a recorded message (e.g. “Normal service will be resumed”, etc), a feed from a flashcard player, audio from a conected USB flash drive or an alternative recorded program. Controls are provided to start external equipment and to provide remote status indication.

Sonifex RB-SD1IP Features:

  • IP Enabled with Web Browser control interface
  • SNMP V1 Compatible
  • Trap generation for non-networked hardware via GPIO port
  • USB Functionality

Sonifex RB-SD1IP Specifications:

  • Audio Specification
    • Maximum Input Level: +28dBu
    • Input Impedance: >100 kOhm balanced
    • Maximum Output Level: +28dBu
    • Output Impedance: As input, except when using unbalanced auxiliary input where output impedance <50 Ohm
    • Frequency Response: 20Hz - 20kHz +/- 0.1dB
    • Gain: +8dB (for unbal input B - optional)
    • Noise: <-93dB, unity gain, ref +8dBu output for unbal input
    • Distortion: As input for balanced input, <0.02% @ 1kHz ref +8dBu output for unbalanced input
  • Rear Panel Connections and Controls
    • Inputs (Main & Auxiliary): 4 x XLR 3 pin female (balanced, auxiliary can be unbalanced)
    • Output: 2 x XLR 3 pin male (balanced)
    • Remotes: 15 way D-Type plug
    • GPIO: 9 way D-Type socket
    • Alarm Threshold: -15dBu to -60dBu in 3dB steps via rotary switch 0dBu to -60dBu in 3dB steps via web GUI
    • Silence Detect Duration: 2 - 30 seconds in 2 second intervals & 125 second option via rotary switch 1 second – 24 hours using web GUI
    • Detection Type: Mono or Stereo, via DIP switch Mono, Stereo, or dual mono via web GUI
    • Silence Switch Defeat: Disable/enable silence switching, via DIP switch or GUI
    • Remote Start: Latched or momentary, via DIP switch or GUI
    • Ethernet: 10/100Mbps on 1xRJ45 socket with status LEDs
    • Mains Input: Filtered IEC, continuously rated 85-264VAC @47-63hz 10W max
    • Fuse Rating: Anti-surge fuse 1A 20 x 5mm(250VAC)
  • Front Panel Controls and Indicators
    • Controls (With Indicators): Source Select, Mode Select and Restore
    • Indicator: Program and Alarm indicators for left and right source for both Main and Auxiliary channels, power indicator
    • Reset: Recessed push button
    • USB Port: 1 x USB A socket
  • USB
    • The RB-SD1IP can act as a host for low powered USB Mass Storage devices in order to playback Audio files as an emergency backup system for when both Main and Auxiliary sources fail.
  • Physical Specification
    • Dimensions (Raw):
      • 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
      • 19” (W) x 4.3” (D) x 1.7” (H) (1U)
    • Dimensions (Boxed):  
      • 58.5cm (W) x 22.5cm (D) x 7cm (H)
      • 23” (W) x 8.9” (D) x 2.8” (H)
    • Weight:  
      • Nett: 1.4kg  Gross: 2.0kg
      • Nett: 3.1lbs Gross: 4.4lbs
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