The Opus Technologies LD2.2 is a remarkable Dual-Channel Induction Loop Amplifier, featuring two independent amplifiers.

This product provides AGC to ensure optimum audio quality; a fault synthesis is also included, allowing control of the Loop & Amplifier. It’s important to note, that the information displayed on the front panel can be deported thanks to a dry contact.

The LD2.2 can equip adjoining rooms (amphitheatres, courtrooms) with two magnetic loops. This type of installation limits the external radiation of the magnetic field, guaranteeing uniform coverage.

Product Features

• Class-D amplifier
• Fanless convection
• Metal loss correction
• Automatic gain control
• Continuous loop monitoring with NO-NC relay

Product Specifications

Additional:

• Operating Temperature: 0 to +45°C
• Storage Temperature: -30° to +70°C
• Multi Loop Coverage: 525m² (15x35m²)
• Single Loop Coverage: 1200m² (20*60m²)

Input:

• Slave Entry: 6.35mm Jack
• Phantom Supply: 12V 2mA
• Priority: 100V input, INPUT 1
• Connector Type: Phoenix and/or Combo Neutrik
• Audio Inputs: 3 inputs: x2 line/microphone, x1 100V
• Sensitivity: -50dB microphone, +40dB 100V, -10dB line

Power Supply:

• Type: Integrated
• Nominal Power: 100W
• Maximum Input Power: <600VA
• Voltage: 115/230V (automatic); 50/60 Hz
• Consumption At Rest: 14W at 230V AC, 2 loops of 1Ω connected; ambient temperature after 30 minutes of stabilization

Audio Characteristics:

• Phase Shift: Included
• THD: <0.5% @ 1Ω / 1KHz
• Bandwidth: 80 Hz to 9.5 kHz @ -3 dB
• Metal Loss Correction: 0 to 3 dB per octave
• Automatic Gain Control: AGC optimized for speech (dynamic > 36dB)

Outputs:

• Loop Impedance: 0.5Ω
• Peak Current: 2 x 11A pk
• RMS Current: 2 x 7.5A rms
• Output Voltage: 34V rms (48V pK)

Functions:

• LED Display: «Power», «Protect», «Clip», «Loop»
• Relay: NO/NC fault relay; 0.5A/125Vac, 1A/24VDC
• Verification (Synthesis Fault): Open Loop; thermal protection

Dimensions:

• Weight: 1.56 kg
• Dims: 42 mm H x 200 mm L x 215 mm D