Monacor LA-402 Teleslynge forsterker


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Active loop amplifier with dynamic compressor for setting up an inductive sound reproduction system in large rooms up to 750 m2.

Inductive transmission of audio signals allows users of hearing aids with a T-coil or inductive receivers, e.g. the LR-202, to receive audio signals.

Wireless transmission is an advantage of inductive sound reproduction systems which makes it possible for the user to move freely within the loop.

Inductive sound reproduction systems are used for various applications, e.g. as a hearing aid for the hearing impaired in houses of worship, theatres, cinemas, waiting rooms and lounges, as interpreting systems, for lectures in museums, exhibitions, etc.

With inductive sound reproduction systems, an inductive loop made of a wire winding is laid on the floor, the wall or along the ceiling and is controlled by a constant current amplifier.

Thus, a magnetic field is created within the loop which induces a voltage into the T-coil of the hearing aid or into the inductive receiver.

In the receivers, this voltage is then converted again into an audio signal.

  • Dynamic compressor
  • Automatic talkover
  • Metal loss correction 0-3 dB/oct.
  • 3 mic/line inputs with 40 V phantom power, to be switched on additionally
  • 6.3 mm input for inserting external devices
  • Integrated SD card reader for reproduction of stored alarm messages
  • 2-way tone control
  • LED level meter
  • 482 mm (19″) rack installation with supplied mounting brackets
  • Tekniske data
    Loop current 14 A (peak)
    Loop resistance 0.2-2 Ω
    Room size up to 750 m2
    Inputs mic 1.5 mV/6.8 kΩ, XLR, bal.switchable to

    line 630 mV/10 kΩ, XLR, bal.

    line 630 mV/4.7 kΩ, RCA, unbal.

    alarm: 2 screw terminals

    for connecting a switch

    Outputs Lloop: 2 screw terminals
    Equalizer bass ±10 dB, 100 Hz
    Equalizer treble ±10 dB, 10 kHz
    Frequency range 50-8,000 Hz
    THD < 1%
    Admiss. ambient temp. 0-40 °C
    Power supply ∿ 230 V/50 Hz/230 VA
    Dimensions 482 x 88 x 280 mm, 2 RS
    Weight 6.97 kg