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ILD1000G Professional rack mountable loop driver

The ILD1000G Professional rack mountable loop driver is now obsolete – please see C10-1 Perimeter hearing loop driver

The ILD1000G sets the standard for high performance professional perimeter induction loop systems. Utilising a new amplification technology, the ILD1000G provides the highest power output available in a single channel amplifier, while halving power consumption and heat dissipation.

It features ample power to drive the largest perimeter loops to over 1300m2, and high voltage headroom to ensure high quality audio output even in the longest cable runs. All of this power and performance is packaged in an elegant and space efficient 19”1U case.

The ILD1000G is also designed for versatility, with 3 configurable inputs to cope with any scenario, usable freestanding, wall mounted or rack mounted with the included brackets. The ILD1000G is built to our exacting standards and is backed by our 5 year warranty.

Applications include

  • Conference facilities
  • Large places of worship
  • Theatres
  • Sports halls
  • Lecture halls
  • Cinemas

Equipment supplied as standard with the ILD1000G

  • Handbook and installation instructions
  • 197 x 252mm loop system present sign (deaf logo)
  • Region specific mains cable
  • Loop connector
  • Rack mount brackets
  • Status Connector

Product code:

The ILD1000G Professional rack mountable loop driver is now obsolete – please see C10-1 Perimeter hearing loop driver

  • Features
  • Accessories
  • Specifications
  • Standards
  • Downloads
    • Very high output for the largest applications
    • High efficiency class-G amplifier with low heat dissipation
    • Very compact 1U rack mount, wall mount or free standing
    • Versatile input selection
    • 1 XLR balanced microphone
    • 1 XLR balanced mic / line switchable input
    • 1 6.3mm balanced jack line input
    • Low lifetime cost
    • Excellent reliability
    • 5 year warranty
    • Unparalleled sound quality
    • Metal loss corrector
    • Rack mount brackets included
    • Free technical support
  • ILD1000G optional accessories

    Ampetronic can supply an extensive range of additional accessories for installation – discuss your requirements with our sales team and we will provide materials and equipment to suit your application.


    Input adaptorsA range of input adaptors and interface cables to accept most audio source inputs, see table below
    Installation Accessories• 18mm x 0.25mm copper tape
    • PVC extrusion to protect copper tape
    • Installation / warning tape to fix cable or tape to a floor
    Wall mount bracketsWMF1-U
    Phase shifterSP5 for an array system requires a design which can be provided by Ampetronic

    Input adaptors and preamplifiers

    By using the appropriate input adaptor or preamplifier the ILD1000G will accept multiple additional inputs or audio inputs from other sources:

    Input type


    Additional microphoneMP221 preamps can drive up to 2 mics + 2 line inputs
    100V line input
    Low impedance speaker line
    Line Level
    ATT-UJ & ATT-UX transformer isolated attenuators
    Unbalanced microphonesMAT1 adaptor


  • Perimeter Loops – Area Coverage (maximum)

    Capable of driving the largest practical perimeter loops – theoretical area coverage >1000m2 for square areas, >1300m2 for rectangular areas, though the practical limit may be set by the installation environment. Ampetronic design tools and support are available to check the expected performance for your application.

    Combined systems for very large areas

    Multiple ILD1000G amplifiers can be combined using Ampetronic ILC Parallel DriveTM technology to drive systems in excess of 4000m2
    Contact Ampetronic support for details.

    Maximum Cable Length

    The ILD1000G is designed for SINGLE TURN loops for optimum audio quality.
    For loops with DC resistance from 0.5 to 3.0Ω , impedance to 3.5Ω
    Maximum cable length is dependent on cable type and on the application:

    Cable typeMaximum Cable Length (m)
    Normal Use*Transient Speech*
    1.0mm2 copper132153
    2.5mm2 copper181230
    4.0mm2 copper188246
    1.8mm2 flat copper tape233271


    * Short term speech (e.g. service counter, airport PA system) can cope with limited clipping at high frequencies – Ampetronic recommends delivery of full current up to 1.2kHz for these applications.
    Longer term usage or signals with music or high quality audio must deliver full current to at least 1.6kHz to prevent fatigue and give acceptable intelligibility. Many commercially available systems do not deliver sufficient voltage to reproduce critical high frequencies – ask us for more details.


    Power120W 230V AC nominal, 45-65Hz [120V option available]
    Power switch and LED indicator on front panel
    Input 1XLR balanced microphone input for 200-600Ω microphones;
    15dB user selectable gain boost; + 15V DC phantom power (selectable); sensitivity – 55dBu; front panel recessed gain control
    Input 2 Selectable microphone / lineXLR balanced input, switched between microphone and line on the rear panel. Microphone specifications as for input 1
    Line specifications: 15dB user selectable gain boost;
    sensitivity -30dBu; overload protected; phantom power disabled in line mode; front panel recessed gain control
    Input 3 Line input6.3mm jack socket balanced line input; sensitivity -30dBu;
    overload protected, front panel recessed gain control
    Link I/O6.3mm jack socket insert point for connection of SP5 phase shifter
    0dBu signal can be used for recording


    Drive voltage31.8Vrms 45V peak at maximum output current
    Drive current• 9.2Arms (13Apk) continuous 1kHz sine wave peak >13A
    • Short term peaks >19A
    • Front panel recessed control
    • Drive current indicated on 6-LED display in 3dB increments
    Loop connectorNeutrik NL4 Speakon (supplied)
    Loop monitorProvides access to actual loop current via a 3.5mm stereo
    headphone connector on front panel
    StatusA pair of isolated relay contacts to indicate system status;
    fault = open circuit: system O.K. = short circuit


    Idle1/6 peak Output Current (Speech)1/3 peak Output Current (Pink noise)Full Power
    DriverChannelsCurrent (ARMS)Load Resistance (Ohms)AC In (W)BTUAC In (W)BTUAC In (W)BTUAC In (W)BTU



    Frequency response80Hz to 6.5kHz
    Automatic gain controlThe AGC is optimised for speech. Dynamic range >36dB
    Metal loss correctionCorrects system frequency response due to metal structures in a building.
    Gain constant at 1kHz, adjustable gain slope from 0 to 3dB per octave. This does not compensate for signal loss from metal structures which can be significant.


    Fault monitoringThree LED fault indicators on the front panel;
    • Overload – delivering over the rated current or voltage
    • Overheat – unit is too hot (mutes output signal)
    • Loop error – short circuit / open circuit error
    Status ContactA pair of relay contacts are provided for remote fault monitoring
    AncillaryTo supply Ampetronic ancillary units ±15V DC 0.15A power outlet on rear panel
    CoolingForced ventilation. Air intake on left panel, air ejection at rear



    DimensionsFull width 1U 19″ rack mount
    Width 430mm Depth 220mm Height 44mm
    Mounting options• Freestanding
    • 1U 19″ rack mount (brackets included)
    • Wall mounting (requires additional brackets)
    EnvironmentIP20 rated; 20 to 90% relative humidity; 0 to 35ºC
  • Standards compliance

    The ILD1000G is CE marked to all relevant safety and EMC standards.
    All Ampetronic amplifiers can be used to create a system that meets the requirements of IEC118-4 and the relevant recommendation of BS7594, however the design and installation of the system is equally important to meet these Induction Loop Standards.
    Some Ampetronic products are CSA registered for sale in the USA and Canada – contact Ampetronic for details.

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