Opus LD3.0 Class D Hearing Loop Amplifier

The Opus LD3.0 is a high-efficiency Class D hearing loop amplifier designed for large-area assisted listening installations that require strong output and dependable coverage. Built to cover up to 900 square meters in a single loop configuration, it is well suited for larger public spaces where clear hearing loop performance and consistent audio delivery are essential.

With two switchable line or microphone inputs, a priority 100 V input, and integrated audio processing, the LD3.0 supports flexible installation in professional environments. Its 10 A RMS output current, built-in compressor, and automatic gain control help maintain controlled, intelligible audio quality, while status LEDs, metal loss correction, and fault relay support make it a practical choice for permanent accessibility-focused installations.

Key Features of the Opus LD3.0

• High-Efficiency Class D Amplifier: Designed for hearing loop installations that require efficient power delivery and dependable performance.
• Large Single-Loop Coverage: Covers up to 900 m² in a single loop configuration for broad-area assisted listening support.
• 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 10 A RMS output current for demanding hearing loop applications.
• Status and Monitoring Indicators: Includes LED indicators for Power, Protect, Clip, and Loop status.
• Metal Loss Correction: Provides adjustable correction from 0 to 3 dB per octave to support system tuning.
• Fault Relay Support: Offers NO/NC fault relay functionality for monitoring and integration needs.

Technical Specifications

• Brand: Opus
• Model: LD3.0
• Product Type: Class D hearing loop amplifier
• Maximum Coverage, Single Loop: 900 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
• Power Supply Type: Integrated
• Voltage: 115-230 V, 50/60 Hz
• Power Consumption at 1 Ohm: 90 W
• Maximum Input Power: Less than 350 V AC
• Consumption at Rest: 9 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
• Loop Impedance: 0.5 to 3.0 Ohm
• Output Voltage: 34 V RMS (48 pk)
• Peak Current: 15 A
• RMS Current: 10 A RMS at 1 kHz
• Slave Output: 0° or 900 phase shift
• LED Display: Power, Protect, Clip and Loop
• Metal Loss Correction: 0 to 3 dB per octave
• 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: 1.48 kg
• Operating Temperature: 0 to 45 °C
• Storage Temperature: -30 to 70 °C