+33 (0) 9 81 24 00 06 contact@opus-technologies.fr



The Opus Technologies LD1.2 is next-generation low-loss magnetic loop amplifiers witch incorporates two independent amplifiers out of phase.

%It provide an output current of 2x5Arms as well as a AGC to ensure optimum audio quality. The amplifier incorporate a fault synthesis that controls contiuously 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 tow 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 LD1.2 proven technologiy and quality of manufacturing allow us to offer a 5 years warranty.

  • Class D amplifier
  • Ultra compact design
  • Total efficiency up to 92%
  • Fanless convection
  • Hight output voltage up to 48Vpk
  • Automatic gain control
  • Metal loss correction
  • Wall rounting attachment
  • Continuous loop monitoring with NO-NC relay
  • 5 years warranty
Max coverage : single loop 600 m² (15*40 m²)
Max coverage : multiloop 300m² (10x30m²)
Operating temperature 0 to +45°C
Storage temperature -30 to +70°C
Audio inputs 3 inputs: x2 line/microphone, x1 100V
Connector type Phoenix and/or Combo Neutrik
Phantom supply 12V 2mA
Sensitivity -50dB microphone, +40dB 100V, -10dB line
Slave entry Jack 6.35mm
Priority 100V input, INPUT 1
Type Integrated
Voltage 115/230V (automatic)
50/60 Hz
Nominal power consumption at 1 Ohm 50 W
Maximum input power <500VA
Consumption at rest on connected loop 14W at 230V AC, 2 loops of 1 Ohm connected, at ambient temperature after 30 minutes of stabilization
THD <0,5% @1ohm / 1KHz / nominal current
Metal loss correction 0 to 3 dB per octave
Automatic gain control AGC optimized for speech
Dynamic > 36dB
Bandwidth 80 Hz to 9,5 kHz at -3 dB
Phase shift Included
Loop impedance 0,5Ω à 3Ω
Output voltage 34V rms(48V pK)
Peak current 2x 8Apk
RMS current 2 x 5Arms
LED display «Power», «Protect1», «Protect2», «Loop»
Verification (synthesis fault) Open loop
Thermal protection
Relay NO/NC fault relay
0,5A/125Vac, 1A/24VDC
HxLxD 42 x 200 x 215 mm
Weight 1,56 kg

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4 allée Pierre-Gilles de Gennes, Technopole Montesquieu 

33650, Martillac, FRANCE

(+33) 09 81 24 00 06