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D14-2 networkable DSP hearing loop driver

The D14-2 networkable DSP hearing loop driver represents the global benchmark for digital audio induction loop systems. The compact, elegant and sturdy units not only feature digital signal processing and networking functionality, but are also the most versatile and powerful solution available.

The D14-2 hearing loop amplifier is a 14 Amp dual output class ‘D’ driver; meaning a 60%+ increase in energy efficiency over existing solutions. Both drivers feature capacitive touch front panels with intuitive menus, built in test signals, and are fully networkable with a Wi-Fi accessible standard browser based control panel for remote set-up, monitoring and email alerts, and with Loopworks Measure LoopLink for easy test and commissioning.

The D14-2 networkable DSP hearing loop driver features 14 Amps per loop output plus ample voltage headroom, making it the most flexible solution on the market, suitable for a huge range of applications. The added power of the D14-2 provides a solution for installations in environments containing very high levels of metal, previously not possible without the use of combiners.

In another first for high-power Class D Induction Loop drivers, installation can be performed with total confidence, as unique multi-stage filtering ensures compatibility with both other system equipment and global EMC regulations. The D Series also boasts Dual slope Metal Loss Control that caters for a wide range of metal loss frequency characteristics.

Product Code:


Dante option available – see https://www.ampetronic.com/products/d14-2-dante-class-d-networkable-dsp-hearing-loop-amplifier/


Or select from:
D7-2: ~7ARMS dual channel output  – Dante option
D10-1: ~10ARMS single channel outputDante option
D10-2: ~10ARMS dual channel outputDante option
D14-2: ~14ARMS dual channel outputDante option

  • Features
  • Specifications
  • Standards
  • Downloads
    • Drives 2 output channels at 14ARMS each, featuring accurate and stable 90° phase shift
    • Networkable with remote browser interface
    • Built-in test tones – controllable with LoopLink
    • Digital display & intuitive ‘touch’ menu system
    • 3 menu modes; Main, Status & Quick
    • Highly energy efficient Class-D amplifier with low heat dissipation
    • Up to 2 x 1,300m2 Perimeter Loops area coverage
    • Up to 3,300m2 MultiLoop Low Loss area coverage
    • Compact 1U rack mount unit with internal transformer for simple rack installation
    • Optimised for speech frequencies with unmatched intelligibility & capable of high quality musical reproduction
    • AGC & Dual Slope MLC
    • Active status monitoring & remote fault reporting via email
    • Data compliant with: IEC 62489-1 Standard
    Perimeter Loop Systems m2
    DriverMetal Loss1:1 Perimeter Loop3:1 Perimeter Loop
    D7-20dB2 x ≤4002 x ≤650
    5dBMax 5m widthMax 5m width
    10dBMax 5m widthMax 5m width
    D10-20dB2 x ≤1,0002 x ≤1,450
    -10dBMax 5m widthMax 5m width
    D14-20dB2 x ≤1,3002 x ≤1,450
    -10dBMax 5m widthMax 5m width


    MultiLoop Array Systems m2
    Metal LossNon Overlap MultiloopLoss Control MultiloopLow Spill Multiloop
    0dBD7-2 ≤1,7652 x ≤400Max 5m width2 x ≤650Max 5m width
    -5dBD7-2 ≤576
    D10-2 ≤625
    D7-2 ≤961
    D10-2 ≤1156
    D7-2 ≤841
    -10dBD14-2 ≤361D10-2 ≤625D10-2 ≤441
    -15dBD14-2 ≤289D14-2 ≤196


    Indicative metal loss scenarios are based on: 0db = a building with no structural metal, -5dB = a building with reinforced concrete (re-bar) construction, and -10dB = a room with steel raised access floor tiles, -15dB = a room with steel decking or reinforced concrete and raised access floor tiles.

    Multiloop area coverage calculations are based on the following assumptions: 1:1 room aspect ratio, 3mm2 copper tape laid at floor level, base current varies depending on solution employed.


    Power50/80/160W 230V AC nominal, 45-65Hz [120V option available]
    Power switch on front panel
    Fuse values: D10-1 120V – T1.6AL | 230V – T1AL
    Input 1 & 2
    Programmable Microphone / Line
    XLR balanced input switchable between microphone and line via menu

    Microphone specification: 200 – 600 Ω, sensitivity -64dBu

    Selectable 12V phantom power on microphone only

    Line sensitivity: -39dBu

    Input 2 can also be used for AES3 Digital Audio Signals

    Link In6.35mm jack socket for linking more than one amplifier.
    Inserting plug disables other inputs


    Loop Output Drive Voltage33.9VRMS (48Vpk) at maximum output current per channel
    Loop Output/Drive CurrentD14-X 
    • 14ARMS (19.8Apk) up to 60 seconds continuous 1kHz sine
    wave, peak >19.8A per channel
    • Cont. pink noise 6.6ARMS short term peaks >20A per ch.
    • Level controlled via front panel menu or network
    • Drive current indicated on two 4-LED displays in 6dB increments
    Link Out6.35mm jack socket for linking more than one amplifier.
    Loop ConnectorsNeutrik NL2 Speakons (supplied) for each output
    Loop MonitorProvides access to monitor actual loop current via a
    3.5mm stereo headphone connector on front panel
    Channel A on left, channel B on right
    DC OutputResettable, fuse protected 12V 0.1A. Operation can be
    configured via menu.


    Idle1/6 peak Output Current (Speech)1/3 peak Output Current (Pink noise)Full Power
    Driver ModelNumber of channelsCurrent (Arms)Load Resistance (Ohms)AC In (W)BTUAC In (W)BTUAC In (W)BTUAC In (W)BTU




    Audio System

    Frequency Response: 80Hz to 6.5kHz
    Distortion: THD+N <0.2% 1kHz sine at full current
    Automatic Gain Control: The AGC is optimised for speech. Dynamic range >36dB
    Metal Loss Correction: Corrects system frequency response due to metal structures in a building. Gain constant at 1kHz, adjustable gain slope from 0 to 4dB per octave in 0.25dB increments. Custom 2 slope MLC allows different slopes and transition frequency to be set via the menu.
    This does not compensate for signal loss from metal structures which can be significant.
    Phase Shift: User selectable at 0° or 90° between outputs

    Additional Functions

    Fault Monitoring:

    Indicators on the front panel:

    • Clipping – delivering over the rated voltage (per channel)
    • Error – Check status in menu

    Temperature and loop errors reported via the status menu

    Cooling: Variable speed fan cooled. Front inlet, rear exhaust.


    Size: Full width 1U 19” rack mount. Width: 430mm Depth: 290mm Height: 44mm
    Mounting Options: Freestanding 1U 19” rack mount (brackets included)

    • D14-2: 6.9kg
    • D10-2: 5.5kg
    • D10-1: 4.37kg
    • D7-2: 4.62kg

    Environment: IP20 rated; 20 to 90% relative humidity; 0 to 35ºC


  • This product is designed to form part of a system that can meet all of the requirements of the international loop performance standard IEC60118-4, and the relevant parts of BS7594. To fully meet requirements of these standards, correct design, installation, commissioning and maintenance are required.

    All specification data has been compiled in accordance with IEC62489-1, the international standard for audio frequency induction loop equipment. Specification data should only be compared with data compliant to this standard.

    This product is CE and RCM marked to all relevant safety and EMC standards, and is NRTL (ETL) approved for sale in North America.

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