The PLN-1LA10 Loop Amplifier is a high-power amplifier designed specifically for driving wire loops in hearing aid systems. It provides excellent sound quality for hearing-aid users in an area covered by a wire loop, such as public spaces, ensuring clear audio for announcements or music. This solution is ideal for environments like airports, shopping malls, theaters, and educational institutions where hearing assistance is essential.

Key Features:

• High Power Output: Delivers up to 10 A of output current for large coverage areas (up to 600 m²).
• Multiple Inputs: Accepts two microphone/line inputs and a 100 V priority input for integration with a Plena Voice Alarm System.
• Automatic Gain Control (AGC): Enhances intelligibility by amplifying weak signals and attenuating loud ones, ensuring a balanced and comfortable listening experience.
• Limiter Function: Ensures output field strength remains below 100 mA/m, preventing distortion and overload.
• Tone Controls: Includes bass and treble controls to tailor the sound to the environment.
• Metal Loss Compensation: Adjusts sound quality to compensate for any loss due to metal structures in the environment.
• Supervision and Fault Monitoring: Continuous monitoring of key functions with fault detection via a fail-safe relay.

Functions:

• Connectivity: Connects to a mixing amplifier’s line-level output or directly to microphone/line signals.
• Priority Input: Allows connection to a Plena Voice Alarm System with monitoring of pilot-tone presence.
• Master/Slave Configuration: Supports stacking for large-area coverage with a master/slave setup.
• Induction Loop Output: Outputs signals to an induction loop, allowing hearing-aid users to receive clear audio by setting their devices to T-mode.
• Supervision: Monitors the status of all key functions, with a fail-safe relay for fault detection, ensuring reliability in emergency systems.

Controls and Indicators:

• Front Panel:

  • LED power meter
  • Current meter
  • Four status LEDs for fault, limiter, AGC, and loop integrity
  • Headphones socket
  • Tone controls (bass/treble)
  • Three input volume controls (master and two channels)
  • On/Off switch

• Back Panel:

  • Metal loss compensation control
  • Supervision switch
  • Voltage selector
  • Frequency range switch
  • AGC/Limiter switch
  • AGC range control
  • VOX/mix switch
  • Pre/post-amp switch
  • Phantom power switches (for two channels)
  • Mic/line switches (for two channels)
  • Audio input and output connections
  • Fault output (relay)
  • Ground screw
  • Mains socket

Included Components:

• PLN-1LA10 Loop Amplifier
• Power Cord
• 19” Mounting Brackets
• Plena CD
• Safety Information

Technical Specifications:

1. Electrical:

   • Mains Power Supply: 230/115 VAC, ±10%, 50/60 Hz
   • Inrush Current: 7 A at 230 VAC / 14 A at 115 VAC
   • Max Power Consumption: 500 VA
   • Output Current: 10 A
   • Frequency Response: 50 Hz – 10 kHz (+1/-3 dB at -10 dB ref. rated output)
   • Distortion: <1% at rated output power, 1 kHz
   • Bass/Treble Control: -8/+8 dB at 100 Hz / 10 kHz
   • Mic/Line Input: 2 x 3-pin XLR, balanced mic/line level (switchable)
   • Sensitivity: 1 mV / 1 V (mic/line)
   • Dynamic Range: 100 dB
   • Signal-to-Noise Ratio (S/N): 75 dB (flat at max volume)

2. Priority Input:

   • Connector: Screw
   • Sensitivity: 100 V, transformer balanced
   • S/N (flat): 63 dB
   • Pilot Tone Detection: -20 dB, ref 100 V (10 V)
   • Pilot Tone Threshold: -26 dB, ref 100 V (5 V)

3. Audio Outputs:

   • Line Output: 3-pin XLR, balanced, nominal level 1 V
   • Loop Output: Screw connector
   • Slave Output: 1/4” TS jack

4. Mechanical:

   • Dimensions: 94 mm x 430 mm x 320 mm (19" wide, 2U high)
   • Weight: Approx. 11.6 kg
   • Mounting: Stand-alone, 19" rack

5. Environmental:

   • Operating Temperature: -10 ºC to +55 ºC (14 ºF to +131 ºF)
   • Storage Temperature: -40 ºC to +70 ºC (-40 ºF to +158 ºF)
   • Humidity: <95% (non-condensing)
   • Fan Noise: <35 dB SPL at 1m

Certifications:

• Safety: EN 60065
• Immunity: EN 55103-2
• Emission: EN 55103-1
• Induction Loop Systems: EN 60118-4
• Regulatory Compliance: CE marked for Europe

The PLN-1LA10 Loop Amplifier is a reliable, high-performance solution for providing clear and intelligible audio to hearing-aid users in public environments, meeting both safety standards and accessibility needs.