Hidden audio tracking up to up to 5.6km from the control unit - up to 10m separate microphones. For each of the channels there is a selection of miniature microphones that are powered by the central surveillance control unit. The system is fast easy to set up and operate.

Noise reduction

Microphones can be covertly installed in locations that must be monitored through existing or new wiring. Digital Noise Reduction system allows conversations to be understood, even if there is high background noise, whether introduced intentionally or natural.

Very sensitive microphones

Each of these channels can be individually adapted to ambient noises and the level of voice points monitored. The system leads the operator using a set with visual indicators for each channel, which allows the best signal that can be obtained. In calm conditions high sensitivity miniature microphones can allow breathing to be captured within 2 meters.

Visual indicators

Visual indicators indicate when a voice or other activity is present in the target area and provide a warning when a line malfunction occurs or if the microphone is disconnected. The system operates through a wide area of use of standard telephone wire.

External output

As well as live viewing, output from channel outputs is designed for high levels of recording and devices for direct connection to multi-channel audio/video recorders are related to the same area.

Immune to RF detection

This multi-channel sound tracking operation is difficult to detect because it is immune to RF detection systems and RF interference.

Multichannel audio system wired

Designed for long-term monitoring

Instantly understandable audio signals with digital signal processing

Easy to use with Visual indicators for voice or other activities

High sensitivity of microphones miniature individually controlled 

Direct connection to record performance and VCR/DVR systems

Microphones powered by the Central System

5.6 km surveillance range with standard telephone wire

Immune to RF detection and RF jammer

Technical - Control unit

Frequency range: + / - 3 dB from 300 Hz to 4 kHz

Microphone Power: Currently limited delivery

Background noise canceling: up to 35 dB

Headphone outputs: 30 mW / 30 ohm headphones

Recording outputs: rear 1 V max> 10 k ohms load;

Front max 50 mV with 2 ohms to load

Record output impedance: 600 ohms nominal

Channels: 10 microphones.  

Physics - Control unit 

Controls: (For each channel)

 3 levels of microphone sensitivity switch;

10 levels of voter noise;  Headphones volume control.

Indicators: (For each channel)

Red LEDs for fault lines;

Orange and green LEDs for microphone level sensitivity settings;

Yellow LED channel activity.

Connectors - Output:

(For each channel)

3.5mm jack and Phono for high output recording;

3,5 mm jack for low output recording;  

3.5mm stereo headphone jack.

Connectors - Input:

For each channel, a 3.5mm mono jack for the remote line connection to the microphone/pre-amp unit.

12V power: 2.1 x 5.5mm barrel connector.

Power supply: 110/25 V AC 50 Hz to 60 Hz

12 V DC, max 0.5 Amps.

Size 280 x 310 x 104 mm (w xhxv)   

Weight 2.8 kg (including transducer and cables).

Technical - microphones with preamplifier 

Line driver capability: Up to 5.6km with standard telephone wire

Power supply: from the control unit via telephone wires used for signal

Audio dynamic range: > 70 dB (90 dB for active noise reduction)

Audio characteristics: Apartment in the range + / - 3 dB from 300 Hz-4 kHz

Weight: 4 GM including 0.5 m cable line connection.

Contents Control unit

Power adapter:

110/250 V AC with 1.8 m network input and output DC leads.

Microphone / preamplifier: 10