Opus LD1.2 Class D Hearing Loop Amplifier

The Opus LD1.2 is a high-efficiency Class D hearing loop amplifier designed for large-area assisted listening installations. Built to cover up to 600 square meters in a single loop or 300 square meters in a multi-loop configuration, it is well suited for venues that need reliable hearing loop performance with strong audio consistency across broader coverage areas.

With two switchable line or microphone inputs, a priority 100 V input, and integrated audio processing, the LD1.2 is designed for flexible installation in professional environments. Its 2 x 5 A RMS output, built-in compressor, and automatic gain control help maintain clear, controlled audio quality, while status LEDs, fault relay support, and loop verification features add practical monitoring and protection for fixed installations.

Key Features of the Opus LD1.2

• High-Efficiency Class D Amplifier: Designed for hearing loop applications that require efficient power delivery and dependable performance.
• Large Coverage Capability: Covers up to 600 m² in a single loop configuration and 300 m² in a multi-loop configuration.
• Flexible Input Configuration: Includes 2 switchable LINE/Microphone inputs plus 1 priority 100 V input for broader source compatibility.
• Professional Connector Options: Supports Phoenix and Combo Neutrik connections for installation flexibility.
• Integrated Audio Processing: Features a compressor and AGC to help maintain optimal audio quality.
• High Output Current: Delivers 2 x 5 A RMS output current for demanding loop installations.
• Status and Protection Monitoring: Includes LED indicators for Power, Protect 1, Protect 2, and Loop status.
• Fault Relay Support: Provides NO/NC fault relay functionality for system monitoring.
• Loop Verification and Protection: Includes open loop verification and thermal protection features.

Technical Specifications

• Brand: Opus
• Model: LD1.2
• Product Type: Class D hearing loop amplifier
• Maximum Coverage, Single Loop: 600 m²
• Maximum Coverage, Multi Loop: 300 m²
• Audio Inputs: 2 x LINE/Microphone + 1 x 100 V
• Connector Type: Phoenix and/or Combo Neutrik
• Phantom Supply: 12 V, 2 mA
• Sensitivity: -50 dB microphone
• Priority: 100 V input, INPUT 1
• Slave Input: 6.35 mm jack
• Power Supply Type: Integrated
• Voltage: 115-230 V, 50/60 Hz
• Power Consumption at 1 Ohm: 50 W
• Maximum Input Power: Less than 500 V AC
• Consumption at Rest: 14 W at 230 V AC
• THD: Less than 0.5%, 1 Ohm, 1 kHz
• Automatic Gain Control: Greater than 36 dB
• Bandwidth: 80 Hz to 9.5 kHz
• Phase Shift: Included
• Loop Impedance: 0.5 to 3.0 Ohm
• Output Voltage: 34 V RMS (48 pk)
• Peak Current: 2 x 8 A
• RMS Current: 2 x 5 A RMS at 1 kHz
• LED Display: Power, Protect 1, Protect 2 and Loop
• Verification: Open loop and thermal protection
• Relay: NO/NC fault relay, 0.5 A / 125 V AC, 1 A / 24 V DC
• Dimensions: 1.65 x 7.87 x 8.46 inches
• Net Weight: 1.56 kg
• Operating Temperature: 0 to 45 °C
• Storage Temperature: -30 to 70 °C