Contacta V22a Induction loop driver

General Description

The Contacta V22a is a class D dual output hearing loop driver with integral phase shifter for phased array configuration in medium to large size rooms. The amplifier features digital signal processing, continuous self-testing, integrated protection circuit, and backlit colour LCD displaying a simple user interface.

Features

Inbuilt guided hearing loop setup utilising an integral test signal generator
Intelligent self-monitoring system supplies status emails on changes to driver functions
Dual-DSP controlled automatic gain control and high frequency compensation for metal loss
Class-D amplifier output stage capable of delivering x2 >22.6 VRMS @ 8A RMS
Highly-rated custom heat-sinks and active cooling
Integrated universal switch mode power supplies provide
ultra-efficient power utilisation (up to 90% efficient)
Constant current output stage
Adjustable audio time delay for large distance audio syncing
Intuitive and sleek user interface on a full colour LCD
Adjust both drive and loop output levels using an embedded LAN service, minimizing installation time
Settings/profiles saved to a USB storage device
Continuous self-testing
Integrated protection circuits with temperature, voltage, short circuit and DC detection
Full width 1U 19” rack mount

Delivery Includes

1 V22a Hearing loop driver

Technical Data

Dimensions: H 44 x D 301 x W 433mm
Weight 3.2kg
Construction: Mild Steel
Finish Black: Powder Coated
Audio Inputs: 2 X line/microphone inputs (switchable) XLR or Euroblock, Line (optimised for -10dBV to 0dBv), Microphone (12V phantom power via 680Ω optimised for levels above -45dBv)
Loop Outputs: Outputs Voltage 2 x 22.66Vrms (64.09V pk-pk)*, Output Current 2 x 8Arms @ 1KHz (22.62A pk-pk) >1200 seconds (20 minutes)*, Loop Connector 2 x NL4
Audio System: Frequency Response: Frequency Response 100Hz to 5KHz, Distortion: THD<1% (-40dB) full current both channels driven, Automatic Gain Control: DSP controlled, peak detecting, High Frequency Compensation 7 DSP controlled, optimised stages, Audio Signal Delay 10ms to 40ms Display: Backlit TFT 480 x 128 pixels (95mm x 25mm)
Control: Single Rotary Push Control
Mains Input: Voltage: 100V-120V /200V-240V AC (universal auto switching with PFC), Frequency: 50Hz/60Hz, Connection: IEC
Cooling: Custom heatsink with temperature-controlled fan