Opus Technologies LD3.2

The Opus Technologies LD3.2 is next-generation, low-loss magnetic loop amplifier. This device incorporates two independent amplifiers out of phase.

They provide an output current of 2X10Arms, as well as a AGC to ensure optimum audio quality. The amplifier incorporates a fault synthesis that controls continuously the loop and the amplifier. The information is displayed on the front panel and can be deported thanks to a dry contact.

It can equip adjoining rooms (amphitheater, courtroom, etc) with two magnetic loops installed hairpin. This type of installation makes it possible to limit the external radiation of the magnetic field, to guarantee uniformity of coverage and to provide a power which makes it possible to limit the distortions due to the presence of metal.

The LD3.2 proven technology and quality of manufacturing allow us to offer a 5 years warranty.

Last modified: April 14th, 2019
Coverage max: single loop2000m² (25x80m)
Coverage max: multiloop1000m² (20x50m)


Audio input3 differencial inputs: 2x line/microphone and 1X 100V
Connector typePhoenix and/or Combo Neutrik
Phantom supply12V 2mA
Sensitivity-50dB micro, +40dB 100V, -10dB line
Slave input6,35mm jack plub, second LD3.2
Priority100V, input 1


Voltage115/230Vac (automatic) 50/60Hz
Idle consumption9W


THD<0,5% at 1Ω /1KHz / full current
Automatic Gain ControlAGC optimized for speech, dynamic > 36dB
Bandwidth80Hz to 9,5KHz
Phase changeIncluded
Loop impedance0,5Ω to 3Ω
Output voltage34Vrms (48Vpk)
Peak current2X15A
Peak current (at 1KHz)2X10Arms


LED displaysPower, Protect, Clip and Correct Loop
Metal loss correctionAdjustable from 0 to 3dB/octave
RelayNO/NC fault relay


HxLxD42 x 200 x 215mm
Weight1,3 kg