»PROLOOP C«: Inductive loop amplifier for medium sized rooms up to 170 m²

The PROLOOP C loop amplifier is designed for the professional use in medium-sized rooms (up to 170 m²) in private buildings and public facilities, in which particularly high dependability and extremely reliable operation are required.

Thanks to being a 100-percent short-circuit-proof amplifier, with switchable, symmetrical XLR input jacks and an extremely stable output performance, the PROLOOP C is able to meet such demands.

Automatic Gain Control (AGC) guarantees consistent field strength and produces steady sound with a special emphasis on clear speech, even under acoustically challenging conditions.

Corresponding test equipment can be used to evaluate the sound quality via the integrated monitor out jack.

  • High output current: 4.8 A RMS
  • Short-circuit-proof
  • Automatic fuse reset
  • Two symmetrical XLR input jacks
  • One RCA input jack
  • One line-out jack
  • Extra-sturdy jacks
  • Dual action AGC for excellent speech recognition
  • Very reliable, with assured quality
  • Easy monitoring of the magnetic field by using headphones or speakers
  • Treble control the compensation of treble loss due to metal reinforcement in walls

Technical data

Mains connection 115 / 230 V AC (main transfer switch) 50 / 60 Hz, 7-200 W, 10 A fuse
Coverage 170 m² acc. to IEC 60118-4, single-loop, free field
###Induction loop output  
Max. current 4.8 A RMS, 13 A from peak to peak, 1-5 ms, 1 kHz, short-circuit-proof
Max. voltage 31 V 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 response 100 - 5000 Hz ( ± 3 dB)
Distortion < 1%
Cable connection Screw connection on rear panel of the amplifier
LINE OUT 0 dBm-RCA out (with AGC function)
Induction loop monitoring 6.3 mm jack for headphone connection
IN 1 and 2 0.5 mV-100 mV / 10 kΩ (mic.) alt. 25 mV - 4 V/ 10 kΩ (line) AGC, switchable phantom voltage, XLR connections
IN 3 50 mV-10 V / 10 kΩ, RCA connection
Dynamics > 70 dB
Rise time 2 - 500 ms
Fall time 0,5 - 20 dB/s
###Controls and displays  
Treble control 0 - +9 dB, potentiometer
Induction loop adjustment 0 - 170 m², potentiometer
Displays Mains connection: 1 green LED, Input level: 1 green LED , Induction loop power: 1 green LED
Dimensions (H!!x!!W!!x!!D) 64 x 295 x 205 mm
Weight 3,6 kg
Color black

Induction loop system kit

The induction loop system kit contains a complete, portable induction loop system designed for rooms up to 140 m² in size. The set includes the PROLOOP C induction loop amplifier as well as two cable reels with 25 metres of loop wire each and the PROLOOP FSM measuring instrument incl. DIR under-the-chin receiver. The system is easy to use and ready to go »in a flash« – ideal for temporary installations.

The scope of delivery does not include a microphone; recommended microphones: e.g. table microphone or wireless microphones UHF101 and/or UHF401.

Induction loop system kit

A-4246-0, a42460, 4246, A-4271-0, a42710, 4271