PROLOOP LOS is a complete system for the operation of low overspill systems. It includes the full range of electronics required in a single enclosure. Thus, there is a flexibly sized, reliable low overspill solution available to serve neighbouring event rooms and assembly halls up to 300 square metres in size.
The system is equipped with Automatic Gain Control (AGC) to produce stable sound with outstanding speech reproduction, even under difficult acoustic conditions. The integrated monitor output for the corresponding measurement technology makes it possible to easily and conveniently test the sound quality of the induction loop system.
Induction loop amplifier system for low overspill installations
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
Reduced sensitivity in respect to architecture related steel reinforcements
High efficiency, low power consumption
19â design
Well suited for retrofitted installation in theatres, cinemas, concert halls, schools, conference rooms, housing, etc. (Possible for floor reconstructions only)
Technical data
Mains connection: 230 â 240 V AC, 50 Hz, 25 â 700 W
Coverage: 300 m² acc. to IEC 60118-4
Induction loop output
Max. power: 2 x 5 A RMS, 2 x 14 A from peak to peak, 1-5 ms, 1 kHz, continuous 1 kHz, short circuit proof
Max. voltage: 2 x 17 V RMS, 2x 24 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 range: 100 â 5,000 Hz (±3 dB)
Distortion: < 1 %
Cable connection: 2 screw connections on rear panel of the amplifier
Outputs
Master OUT: 0 dBm, RCA (with AGC function)
Slave OUT: 0 dBm, RCA (with AGC function)
Inputs
IN 1: Combined XLR(F) / 6.3 mm jack MIC sensitivity 2.5 mV â 10 V RMS / 10 kO, LINE sensitivity 37 mV â 10 V RMS / 10 kO or phantom voltage 9 â 20 V
IN 2: Dual RCA connections, 45 mV â 10 V RMS / 10 kO
IN 3: Dual RCA connections, 45 mV â 10 V RMS / 10 kO
AGC
Dynamics: > 70 dB
Rise time: 2 â 500 ms
Fall time: 0.5 â 20 dB/s
Rise and fall times depend on the currently active channel
Controls and displays
Loop setting: 0 â 300 m² (with one potentiometer each for master and slave outputs)
Input level: IN 1 and IN 2 can be adjusted separately
Displays: Mains connection: 1 green LED Input level: 1 green LED Induction loop power: 2 green LED
Induction loop monitoring
Two 6.3 mm jacks for headphone connection
Dimensions
Size: 88 x 438 x 280 mm (H x W x D)
Colour: Black
Weight: 9.3 kg
The system is equipped with Automatic Gain Control (AGC) to produce stable sound with outstanding speech reproduction, even under difficult acoustic conditions. The integrated monitor output for the corresponding measurement technology makes it possible to easily and conveniently test the sound quality of the induction loop system.
Induction loop amplifier system for low overspill installations
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
Reduced sensitivity in respect to architecture related steel reinforcements
High efficiency, low power consumption
19â design
Well suited for retrofitted installation in theatres, cinemas, concert halls, schools, conference rooms, housing, etc. (Possible for floor reconstructions only)
Technical data
Mains connection: 230 â 240 V AC, 50 Hz, 25 â 700 W
Coverage: 300 m² acc. to IEC 60118-4
Induction loop output
Max. power: 2 x 5 A RMS, 2 x 14 A from peak to peak, 1-5 ms, 1 kHz, continuous 1 kHz, short circuit proof
Max. voltage: 2 x 17 V RMS, 2x 24 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 range: 100 â 5,000 Hz (±3 dB)
Distortion: < 1 %
Cable connection: 2 screw connections on rear panel of the amplifier
Outputs
Master OUT: 0 dBm, RCA (with AGC function)
Slave OUT: 0 dBm, RCA (with AGC function)
Inputs
IN 1: Combined XLR(F) / 6.3 mm jack MIC sensitivity 2.5 mV â 10 V RMS / 10 kO, LINE sensitivity 37 mV â 10 V RMS / 10 kO or phantom voltage 9 â 20 V
IN 2: Dual RCA connections, 45 mV â 10 V RMS / 10 kO
IN 3: Dual RCA connections, 45 mV â 10 V RMS / 10 kO
AGC
Dynamics: > 70 dB
Rise time: 2 â 500 ms
Fall time: 0.5 â 20 dB/s
Rise and fall times depend on the currently active channel
Controls and displays
Loop setting: 0 â 300 m² (with one potentiometer each for master and slave outputs)
Input level: IN 1 and IN 2 can be adjusted separately
Displays: Mains connection: 1 green LED Input level: 1 green LED Induction loop power: 2 green LED
Induction loop monitoring
Two 6.3 mm jacks for headphone connection
Dimensions
Size: 88 x 438 x 280 mm (H x W x D)
Colour: Black
Weight: 9.3 kg