Sennheiser SI30
Wideband Modulator with Integral Radiator


Our Price: $329.95
List Price: $419.00
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The SI 30 is a wideband modulator with an integral radiator. It can be switched between operation on channel 1 (2.3 MHz), channel 2 (2.8 MHz) and stereo operation. Due to its compact size and relatively low radiating power, the SI 30 modulator/radiator and the SZI 30 radiator are an ideal choice for smaller or medium-sized rooms, for covering recesses or for applications which require transmission of audio information to well defined zones, e.g. in museums.
NOTE: Power supply is not included. Please order as required.


  • New, higher subcarrier frequencies to avoid interference with fluorescent lighting
  • Easy to install
  • Master system can be used independently for up to 750 sq. ft. of coverage
  • SZI 30 slave emitters offer increased coverage
  • Connects to line level audio source via 1/8" or 1/4" plug unbalanced
  • 1-year warranty


  • Modulation: wideband FM
  • Nominal deviation: ± 50 kHz
  • Carrier frequencies: 2.3 MHz, 2.8 MHz
  • AF input: 3-pin Texas socket
  • AF input voltage for nominal deviation: 45 mV–4 V (automatic modulation control)
  • AF frequency response: 30–18,000 Hz
  • THD (1 kHz, nom. dev.): = 1 %
  • AF signal-to-noise ratio: = 60 dB(A) rms
  • RF input–RF output: 1/8" mono jack
  • Output impedance: approx. 50 ?
  • IR diodes: 11
  • Max. coverage area approx.: 80 m, single-chn.
  • Radiating power approx.: 0.5 W
  • Operating voltage: 24–27 V DC via 2-pin Texas socket
  • Current consumption: approx. 180 mA
  • Dimensions: approx. 4.64" x .98" x 3.54"
  • Weight: approx. 4.93 oz

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