Opus LD3.2 Class D Hearing Loop Amplifier

The Opus LD3.2 is a high-efficiency Class D hearing loop amplifier designed for large-area assisted listening installations that require strong output and flexible coverage. Built to cover up to 2,000 square meters in a single loop configuration and 1,000 square meters in a multi-loop setup, it is suited for larger venues where clear, consistent hearing loop performance is essential.

With two switchable line or microphone inputs, a priority 100 V input, and integrated audio processing, the LD3.2 supports flexible installation in professional environments. Its 2 x 10 A RMS output current, built-in compressor, and automatic gain control help maintain controlled, intelligible audio quality, while status LEDs, loop verification features, and fault relay support make it a practical choice for permanent accessibility-focused installations.

Key Features of the Opus LD3.2

• High-Efficiency Class D Amplifier: Designed for hearing loop installations that require efficient power delivery and dependable performance.
• Large Coverage Capability: Covers up to 2,000 m² in a single loop configuration and 1,000 m² in a multi-loop configuration.
• Flexible Input Configuration: Includes 2 switchable LINE/Microphone inputs plus 1 priority 100 V input for versatile source integration.
• 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 10 A RMS output current for demanding hearing loop applications.
• Status and Monitoring Indicators: Includes LED indicators for Power, Protect 1, Protect 2, and Loop status.
• Loop Verification and Protection: Includes open loop verification and thermal protection features.
• Fault Relay Support: Offers NO/NC fault relay functionality for monitoring and integration needs.

Technical Specifications

• Brand: Opus
• Model: LD3.2
• Product Type: Class D hearing loop amplifier
• Maximum Coverage, Single Loop: 2,000 m²
• Maximum Coverage, Multi Loop: 1,000 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: 180 W
• Maximum Input Power: Less than 700 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 15 A
• RMS Current: 2 x 10 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