The D7-2 Digital Hearing Loop Amplifier represents the global benchmark for digital audio induction loop systems. Featuring all the benefits of the Standard D14-2 driver with added Dante Input for additional Network Audio.
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 Dante 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.
Product Code:
D7-2 Dante
| 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 |
| 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 Dante RJ45 Ethernet input AES67 compliant |
| Slave 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 |
| Slave Out | 6.35mm jack socket to connect to other slave amplifiers |
| 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 |
Hamburg, Germany
London, United Kingdom
Manchester, United Kingdom
Systems to meet the varied needs of the site
Hearing impaired rail users truly benefit
London, United Kingdom
True benefit and value to those with hearing loss
Tauranga, New Zealand
Areas serve a diverse range of uses
New South Wales, Australia
Provides equal access for those with hearing impairment
Parliament Hall, Edinburgh, Scotland, United Kingdom
