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D7-2 networkable DSP hearing loop driver

The D7-2 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 D Series range consists of 4 class ‘D’ drivers (3 dual loop output and 1 single output models); meaning a 60%+ increase in energy efficiency over existing solutions. 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 D7-2 features 7 Amps per loop output respectively plus ample voltage headroom, making it the most flexible solution on the market, suitable for a huge range of applications.

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.

D7-2 networkable DSP hearing loop driver applications include:

  • Lecture Theatres & Conference facilities
  • Stadia, Sports Halls, Cinemas & Theatres
  • Courts Rooms, Airports & Railway Stations

Product Code:


 Dante option available see https://www.ampetronic.com/products/d7-2-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
  • Downloads
    • Single or dual output options. Dual outputs 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 amplifiers with low heat dissipation
    • Up to 2 x 650m2 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
    Driver Metal Loss 1:1 Perimeter Loop 3:1 Perimeter Loop
    D7-2 0dB 2 x ≤400 2 x ≤650
    5dB Max 5m width Max 5m width
    D10-1 0dB ≤1,000 ≤1,450
    10dB Max 5m width Max 5m width
    D10-2 0dB 2 x ≤1,000 2 x ≤1,450
    -10dB Max 5m width Max 5m width
    D14-2 0dB 2 x ≤1,300 2 x ≤1,450
    -10dB Max 5m width Max 5m width


    MultiLoop Array Systems m2
    Metal Loss Non Overlap Multiloop Loss Control Multiloop Low Spill Multiloop
    0dB D7-2 ≤1,765 2 x ≤400Max 5m width 2 x ≤650Max 5m width
    -5dB D7-2 ≤576
    D10-2 ≤625
    D7-2 ≤961
    D10-2 ≤1156
    D7-2 ≤841
    -10dB D14-2 ≤361 D10-2 ≤625 D10-2 ≤441
    -15dB D14-2 ≤289 D14-2 ≤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.


    Power 50/80/160W 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 In 6.35mm jack socket for linking more than one amplifier.
    Inserting plug disables other inputs


    Loop Output Drive Voltage 33.9VRMS (48Vpk) at maximum output current per channel
    Loop Output/Drive Current D7-X
    •7ARMS (10Apk) up to 60 seconds continuous 1kHz sine
    wave, peak >10A per channel
    • Cont. pink noise 3.3ARMS short term peaks >10A per ch.D10-X• 10ARMS (14.1Apk) up to 60 seconds continuous 1kHz sine
    wave, peak >14.1A per channel
    • Cont. pink noise 4.7ARMS short term peaks >14.1A per ch.D14-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 Out 6.35mm jack socket for linking more than one amplifier.
    Loop Connectors Neutrik NL2 Speakons (supplied) for each output
    Loop Monitor Provides 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 Output Resettable, fuse protected 12V 0.1A. Operation can be
    configured via menu.


    Idle 1/6 peak Output Current (Speech) 1/3 peak Output Current (Pink noise) Full Power
    Driver Model Number of channels Current (Arms) Load Resistance (Ohms) AC In (W) BTU AC In (W) BTU AC In (W) BTU AC In (W) BTU
    D14-2 2 14.0 0.44 23 78 41 107 90 176 317 493
    D14-2 2 14.0 1.2 23 78 59 112 167 213 736 906
    D14-2 2 10.0 2.4 23 78 52 85 141 117 560 273
    D10-2 2 10.0 0.44 18.4 63 27 76 52 111 163 256
    D10-2 2 10.0 1.2 18.4 63 36 76 88 118 337 331
    D10-2 2 7.0 2.4 18.4 63 32 65 73 71 284 167
    D10-1 1 10.0 0.47 13 44 17 49 30 67 91 150
    D10-1 1 10.0 1.0 13 44 21 53 46 81 171 242
    D10-1 1 7.0 2.0 13 44 19 46 41 66 156 198
    D7-2 2 7.0 0.44 12 41 32 101 44 117 97 184
    D7-2 2 7.0 1.0 12 41 35 101 60 130 191 317
    D7-2 2 5.0 2.0 12 41 28 77 57 119 168 232




    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


    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)
    Weight D7-2: 4.62kg
    D10-1: 4.37kg
    D10-2: 5.5kg
    D14-2: 6.9kg
    Environment IP20 rated; 20 to 90% relative humidity; 0 to 35ºC


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