The D Series 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 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.
Dante option available – see https://www.ampetronic.com/products/d14-2-dante-class-d-networkable-dsp-hearing-loop-amplifier/
|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|
|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|
|-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
|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|
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
Indicators on the front panel:
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)
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.
Reliable and inexpensive.
London, United Kingdom
Those with hearing loss can enjoy the same experience
New South Wales, Australia
Provides equal access for those with hearing impairment
Liverpool, United Kingdom
Right solution for a complex set of requirements
Wiltshire, United Kingdom
Reception and information desks
Minimise metal loss effects
Nottingham, United Kingdom
NYC, United States
Genuine benefit to the hard of hearing people
Macclesfield, United Kingdom