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Humantechnik Proloop LOS Induction Loop Amplifier

Low overspill induction loop systems have traditionally required several devices, complex design, and high labour costs end to end... Until Now.
The Proloop LOS low overspill system by Humantechnik brings a new level of flexibility, configurability and affordability to assistive listening devices.
A low overspill solution has never been simpler.

The PROLOOP LOS is a compact system designed to operate low overspill systems.

It integrates the entire electronic configuration required in a single enclosure to provide a flexibly sized, reliable low-overspill solution for the coverage ofadjacent event rooms and assembly halls up to a size of 300 sq meters

The system is equipped with Automatic Gain Control (AGC) to produce stable sound with outstanding speech reproduction, even under difficult acoustic conditions. The values/data required to test the quality of the induction loop system can be conveniently picked up via anintegrated monitor output.


  • Uniform coverage throughout the room (no dead spots in the middle of the room) / No signal fluctuations when hearing-aid user moves his/her head

  • No signal fluctuations when hearing-aid users move around
  • Reduced sensitivity to architecture-related magnetic fields

  • High efficiency, low power consumption.

  • 19? 2RU rackmount enclosure
  • Well suited for retrofitted installation in theatres,cinemas, concert halls, schools, conference rooms


  • Mains connection:
  • 230 - 240 V AC, 50Hz, 25 - 700 W
  • Coverage:
  • 300m2 acc. to IEC 60118-4, single-loop


Induction loop output


  • Max. power:
  • 60 A from peak to peak, 1-5ms, 1 kHz, 2 x 13 A RMS, continuous 1 kHz, short-circuit-proof
  • Max. voltage
  • 47 V from peak to peak
  • Output AGC:
  • Sets voltage and power for steady signals like oscillation and sine curves after 0.6-1 seconds to -10 dB.Short pulses and normal program signals are not limited
  • Frequency range:
  • 100 - 5000 Hz (±3 dB)
  • Distortion::
  • < 1%
  • Cable connection:
  • 2 screws on the rear panel of the amp


Outputs / Inputs

  • Master OUT:
  • 0 dBm, RCA (with AGC function)
  • Slave OUT:
  • 0 dBm, RCA (with AGC function)
  • IN 1:
  • Combined XLR / 6.35 mm connection plug
  • MIC sensitivity:
  • 2.5 mV - 10V RMS / 10 kOhms
  • Phantom voltage:
  • 9 - 20 V or LINE sensitivity 37 mV - 10V RMS/10 kOhm
  • IN 2:
  • Dual RCA connections, 45 mV - 10V RMS / 10kOhm
  • Dual SCART connection plug,50mV RMS IN (TV) / OUT (DVD-VCR-SAT)



  • Dynamics:
  • > 70 dB
  • Rise time:
  • 2 - 500 ms
  • Fall time:
  • 0.5 - 20 dB/s
  • Rise and fall times depend on the currently activechannel




  • Dimensions (H x W x D):
  • 88 x 438 x 280 mm
  • Colour:
  • Black



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