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Sonifex DHY-04G

Single Automatic GSM Hybrid, AES/EBU & Analogue I/O With Ethernet
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A new addition to the DHY-04 range is the ability for the DHY-04G version to be used on a GSM cellular (mobile) phone network instead of a telephone (POTS) line

Product Options

DHY-04G $1,448.00
DHY-04GS Rack Mount Version $1,448.00
DHY-04GT Twin GSM Hybrid $2,756.00
DHY-04GP Digital GSM & POTS TBU, Ethernet $2,781.00
  • The DHY-04G can accept a SIM card in the rear panel slot and by connecting a suitable GSM antenna, the DHY-04G can receive and make high quality broadcast calls over the cellular network, converting the GSM call to the 4 wire audio signal to and from a connected mixing console. The GSM module used in the DHY-04G is quad-band GSM, so it can take and make calls on any 2G network.

    Ideal for studios in remote locations, for OB vans and trucks on the move, and in emergency situations where a telephone landline can’t be guaranteed, the DHY-04G offers outstanding performance.

    The DHY-04G has all features of the DHY-04 (read cellphone/mobile features instead of telephony features in the listed bullet point specification) together with some additional front panel indicators. There are two LEDs, one for SIM enabled and one for GSM Network availability. Additionally there is a push button which allows the GSM signal level to be displayed on the meter LEDs.


  • Analogue Audio I/O
    Input Impedance - Line Mode (Clean Feed) 10kΩ balanced 0dB
    Input Impedance - Conferencing 10kΩ balanced 0dB
    Input Impedance - Microphone Mode 2kΩ balanced
    Input Level Gain Range +6dB, 0dB, and -6dB adjusted by 3-position front panel switch, +10dB jumper
    Microphone Level Gain Preset From 65dB to 35dB
    Maximum Input Levels Line +26dBu, mic -24dBu
    Clean Feed Limiting Input 4dBu for CTR21 setting, other values available *
    Output Impedance - Line Out 50Ω balanced floating 0dBu
    Output Impedance - Conference/Record 50Ω balanced floating 0dBu
    Output Level Gain Range +6db, 0dB, and -6dB adjusted by 3-position front panel switch
    Digital Audio I/O
    Input Impedance 110Ω ±20% balanced
    Output Impedance 110Ω ±20% balanced
    Sample Frequency Range 30 - 100kHz (i.e. including 32kHz, 44.1kHz, 48kHz, 64kHz, 88.2kHz & 96kHz)
    Signal Level 2V/7V peak to peak min/max
    Analogue Input Level for Full Scale Digits +18dBU
    Telephone Line
    Rejection Ratio 80-88dB on complex waveforms, reference peak level of 0dBFS
    Ring Detector Sensitivity Off, 2, 4 or 6 rings
    GSM Connection
    Module Type Quad-Band EGSM 850 / 900 / 1800 /1900MHz
    Output Power Class 4 (2W) @ 850 / 900MHz, Class 1 (1W) @ 1800 / 1900MHz
    Sensitivity  -107 dBm (typ.) @ 850 / 900MHz, -106 dBm (typ.) @ 1800 / 1900MHz
    Approvals ully type approved conforming to R&TTE CE, GCF, FCC, PTCRB, IC, Anatel
    Power Supply
    Power to DHY-04G, GS & GT Universal 12W power supply: 90 to 250V AC; 47-63Hz; fused 1A
    Mic/Line/AES-EBU Input XLR 3 pin female, with push-button mic/line selection
    Line/AES-EBU Output XLR 3 pin male
    GSM Antenna SMA socket
    Conferencing or Record Audio  RJ45 socket
    Remotes  9-way D-type socket
    Ethernet RJ45 socket
    RS232 Serial 9-way D-type socket
    Power IEC mains (CEE22)
  • Available in Various formats:-

    • DHY-04G Digital GSM TBU, AES/EBU, Analogue, Ethernet, Free Standing
    • DHY-04GS Digital GSM TBU, AES/EBU, Analogue, Ethernet, Rack Mounted
    • DHY-04GT Twin Digital GSM TBU, AES/EBU, Analogue, Ethernet, Rack Mounted
    • DHY-04GP Digital GSM & POTS TBU, Ethernet, Twin Rack Mounted


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