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T14-1 Transport hearing loop driver – bus and coach

T14-1 Bus and coach transport hearing loop driver offers:

  • Cover a whole bus or coach with a single amplifier
  • Unrivalled intelligibility
  • Up to 30 year design lifespan with midlife maintenance

Service broadcasts and emergency announcements through bus and coach Public Address (PA) systems are now part of everyday life. Their direct connection to the user’s hearing aid means that Hearing Loops are the only assistive listening technology suitable for use on public passenger vehicles.

The T14-1 Bus and coach transport hearing loop driver from Ampetronic offers performance you can rely on:

  • Minimises background noise for hearing aid users
  • Remote technical support and network features to control and configure the system
  • Metal Loss Correction for strong clear signals
  • Low lifetime cost
  • Excellent reliability backed by a 5 year warranty

Product code: T14-1LB: 24V power, WAGO connectors


The T14-1 replaces the XA88 and is also available for rail and tram transport (see T14-1 Bus transport hearing loop driver)

The T14-1 hearing loop driver range has been designed as high quality digital, networkable single loop output drivers. The range includes models intended for use in rail or bus applications.
Depending on a number of factors regarding the installation of the loop and the set-up of the driver, the T14-1 range can provide compliance with IEC 60118-4 for appropriately specified loop installations.
Compliance to relevant Standards, reduced weight and heat generation have been major factors in the design, combined with optimised performance and the freedom from R.F.I. generation.
The T14-1 range has a Class D output stage which offers better than 60% increase in energy efficiency over previous solutions. The products feature WAGO or Harting connectors and use remote control and monitoring via a browser based control panel using standard network protocols; including HTTP, Telnet, email and SNMP.
All units feature high power outputs plus ample voltage headroom, making them suitable for any rail, tram or bus application.
Networked T14-1 models also feature dual-slope metal loss compensation that caters for a wide range of metal loss frequency characteristics.

  • Features
  • Variants
  • Specifications
  • Standards
  • Downloads
    • Class D output stage driver for maximum efficiency, unsurpassed in its field
    • Less weight than most alternatives in its class
    • Transformer isolated inputs
    • Industrial Ethernet port
    • USB firmware update port
    • T14-1LB: 24V power, Wago connectors

    Power Supply24V DC, up to 200W max
    WAGO 769 series detachable 3-way block
    Safety GroundM6 chassis stud (nut & star washer supplied)
    Signal InputsInput 1 and 2 Pin selectable 2V / 30V / 100V balanced isolated line
    Input connector Audio inputs, status and enables through
    WAGO 769 series detachable blocks
    Enable InputsIsolated control input per channel
    Ethernet control I/OHTML and Telnet control interface
    M12 circular Industrial Ethernet (TCP/IP), 10/100M


    Loop Output
    Drive Current
    14ARMS (19.8Apk) up to 60 seconds continuous 1kHz
    sine wave, peak >20A
    Cont. pink noise >6.6ARMS
    Loop ImpedanceUp to 0.49Ω reactive at 1.6kHz, with transformer ratio 1.67:1
    Drive Voltage>24VRMS (33Vpk) available at maximum output current
    Loop ConnectorWAGO 769 series detachable 2-way block
    Status OutputIsolated relay contact and network options (inc. SNMP)
    Monitoring of loop resistance and operating status


    Freq. Response100Hz to 5kHz ±1.5dB relative to 1kHz at low level.
    CompressionThe AGC is optimised for speech. Dynamic range
    Gain Control >38dB
    Metal Loss CorrectionDual slope configurable MLC up to 4dB per octave


    DimensionsWidth 295mm, depth 221mm, height 54.5mm excluding connectors
    Operating temperatureAccording to EN50155 to OT4
    -40C to +70C (+85C for 10 mins at startup)

  • Automotive:
    The 24V variant of the T14-1 is compliant with automotive regulation
    EN/ECE R10 encompassing the requirements of EN 50498:2010.

    Loop Performance:
    The T14-1 will enable an Audio Frequency Induction Loop system that meets the requirements of EN 60118-4:2006 to be created, if the system is specified, installed and commissioned in an appropriate manner, including observing Ampetronic instructions.

    Standards compliance to IEC 62489-1
    T14 amplifiers are designed to form part of a system which can meet all requirements of international loop performance standard IEC 60118-4, and relevant parts of BS 7594. To fully meet requirements of these standards, correct design, installation, commissioning and maintenance are required.

    Ampetronic drivers have CE and UL marks to all relevant safety and EMC standards.

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