Induction loop Amplifier »Pro Loop LOS«
The Pro Loop LOS is a highly flexible and secure solution for supplying large event and assembly rooms with inductive audio signals, which allows for a wide variety of loop designs due to its dual-channel capability.
The system features Automatic Gain Control (AGC). This allows it to produce a stable sound with excellent speech reproduction even under difficult acoustic ambient conditions. The integrated monitor output for the corresponding measurement technology allows a comfortable and easy quality check of the loop system.
Essential features
- Homogeneous supply of the respective room (no signal-free areas in the centre of the room)
- High output current: 2x 5 A RMS
- No signal fluctuations during head movements of the hearing aid wearer
- Reduced sensitivity to structural steel reinforcements
- High efficiency, low power consumption
- 19" construction
- Well suited for retrofit installation in theatres, cinemas, concert halls, schools, conference rooms, residential facilities, etc. (Only possible with floor reconstructions)
Technical data
| Mains connection: | 230-240 V AC 50 Hz, 25-700 W |
| ###Induction loop output | |
| Max. power: | 2x 5 A RMS |
| Max. voltage: | 2x 21.9 V RMS |
| 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 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) |
| Induction loop monitoring: | Two 6.3 mm jacks for headphone connection |
| ###Inputs | |
| IN 1: | Combined XLR / 6.35 mm connector, MIC sensitivity 2.5 mV – 10V RMS / 10 kΩ, LINE sensitivity 37 mV – 10V RMS / 10 kΩ or phantom voltage 9 – 20 V |
| IN 2: | Double RCA connections, 45 mV – 10V RMS / 10kΩ |
| SCART (IN/OUT): | Double RCA connections, 45 mV – 10V RMS / 10kΩ |
| ###AGC | |
| Dynamics: | > 70 dB |
| Rise time: | 2 - 500 ms |
| Fall time: | 0.5 - 20 dB/s Rise and fall times depend on the currently active channel |
| ###Controls and displays | |
| Loop setting: | 0 – 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 |
| ###Enclosure | |
| Dimensions!!(H!!x!!W!!x!!D): | 88 x 438 x 280 mm |
| Colour: | black |
| Weight: | 9.3 kg |