Sennheiser EM 3731-II Frequency Agile Diversity Receiver (L Band)


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Dale #:SENN-EM3731IIL

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  • The EM 3731/3732-II series is characterized by high transmission reliability, exceptional audio quality and simple operation. A switching bandwidth of up to 184 MHz, more than double that of its predecessors, combined with a range of connection options guarantee optimal flexibility for daily use. The integrated Ethernet connection means that the receivers can be linked into any network. The AES3/EBU digital audio interface facilitates a direct connection to digital mixing consoles. Sennheiser's "Wireless Systems Manager" (WSM) software allows you to monitor and control all receiver operating statuses remotely. In addition, this versatile software now lets you reset the channel allocation at any time and store it as a "Scene". A new innovative WSM feature for multi-channel operation is the immediate identification of the channel allocated to each receiver at the press of a button. A high-contrast display and intuitive user interface complete the scope of features of this high-quality receiver. The EM 3732-II is available in L, N and P frequency variants.


    • Up to 184 MHz switching bandwidth
    • Digital AES 3 audio output with external word clock synchronisation
    • Integrated antenna splitter for daisy-chaining up to eight devices
    • Intuitive user interface with OLED display
    • Network integration via ethernet for use of the WSM software on Macs and PCs
    • DSP-based HiDyn plus expander
    • Transformer balanced audio outputs
    • Scanning function
    • Frequencies adjustable in steps of 5 kHz
    • Squelch setting displayed continously
    • Command audio output ( EM 3732 COM-II only)
  • RF frequency range (USA)470 - 698 MHz
    RF frequency range (outside USA)L: 470-638 MHz, N: 614-798 MHz, P: 776-960 MHz
    Switching bandwidthUp to 184 MHz
    Receiving frequency6 frequency banks with up to 59 factory-preset frequencies each, 1 frequency bank with up to 60 freely selectable frequencies (tunable in steps of 5 kHz)
    Adjacent channel rejectiontyp. 75 dB / +-400 kHz, typ. 80 dB /+-800 kHz
    Squelch13 steps (0 ... 30 μV)
    Intermodulation spacing≥80 dB
    Antenna connector2 BNC connectors (50Ω)
    Cascadable2 BNC connectors (50Ω)
    Gain0 dB ±0.5dB (ref. to antenna input)
    CompanderSennheiser HiDyn plus emulated by DSP, Latency ≤1.9 ms
    Frequency response40 ... 20,000 Hz
    Nominal deviation± 40 kHz
    Peak deviation± 56 kHz
    Signal-to-noise-ratio≥118dB (A) (analogue AF OUT), 140dB (AES3 audio out)
    Total harmonic distortion (THD)≤0.3%
    Output voltage+18 dBu to -10 dBu, adjustable in steps of 1 dB (transformer balanced)
    Audio-XLR connectoranalogue: XLR-3, digital AES3: XLR-3 Sample Rates: 44.1, 48, 88.2, 96 kHz, 24 Bit
    Booster12 V DC, 2 x 200 mA, short-circuit-proof
    Power supply100 - 240 V AC, 50/60 Hz
    Power consumptionmax. 50VA, 20 W (AC)
    Operating temperature-10 °C ... +55 °C
    Storage temperature-25 °C ... +70 °C
    Dimensions17.2 x 1.7 x 9.8 in (436 x 44 x 250 mm)
    Weightapprox 9 lbs (4080 g)
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