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ProLoop D15 (1300m2)

Order Code: 230-208

£669.00 ex. VAT

£802.80 inc. VAT

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This product carried a warranty for 2 years

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2 Year Warranty

If you have a pacemaker or ICD fitted you should read your user manual along with the FAQ's on our website before using this product. If in doubt consult your cardiologist. Click for more information.

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This product is suitable for users with hearing aids that have the 'T' or loop facility.

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PROLOOP D15: class-D loop driver for large rooms up to 1.300 m²

The loop amplifier PROLOOP D15 is specially designed for deployment in public and commercial installations. The system is actively protected against short circuits and is notable for its high reliability and safety. The PROLOOP D15 supplies rooms up to 1300 m² with steady inductive audio signals of excellent quality.

The combo-XLR-3 in-port as well as a further phoenix contact are individually configurable:

a) as audio-in (balanced)

b) as microphone-in (unbalanced)

The microphone mode allows the selection of phantom power for the use of condenser microphones.

The Automatic Gain Control (AGC) guarantees a constant field strength, a exemplary high stability in sound volume and good sound reproduction. A monitor port allows a direct connection with further loop amplifiers.





  • Easy to use
  • High current output: 15 A RMS
  • Resistant housing
  • Compact build / requires less rack space
  • High energy efficiency - low consumption
  • Low heat generation
  • Active protection against short circuits
  • Combo-XLR-3 input and input via phoenix contact, configurable for: microphone (phantom power) or audio source
  • Input for 100V-signals, transformer-decoupled
  • Automatic Gain Control (AGC), loop current control
  • 6,3mm headphone jack for monitoring audio signals
  • Adjuster for metal loss compensation
  • Suitable for setting up Low-Overspill-Systems
  • 19 inch rack mounting material included

Technical Information

  • Power supply: 90-265 V AC 50/60 Hz,
  • Passive protection: Fuse 3.15A
  • Maximum area: 1300 m² according to IEC 60118-4

Loop output

  • Max. current: 15 A RMS / 42,4 A peak-peak
  • Max. tension: 34 V RMS / 96 V peak-peak
  • Active protection against short circuits
  • Automatic Gain Control (AGC): Maintains a constant level of the audio signal in the connected loop
  • Frequency range: 100-5000 Hz ( ± 3 dB)
  • Distortion:< 1% at rated power output, 1 kHz
  • Connector:1 Neutrik NL4 speakON-socket, layout 1+/1-


  • Headphone:headphone socket (front face), audio jack 6.3 mm
  • 2x Slave Out with 0° and 90° phase shift, 6,3mm jack plug socket
  • FAULT-output: Device status via potential-free switch contact, not earthed (NO / NC)


  • INPUT 1 and 2:0.5 mV to 100 mV / 10 kOhm (MIC) or 25 mV to 4 V / 10 kOhm (LINE) phantom power configurable, Combo-XLR-3 socket (INPUT 1), Phoenix contact (INPUT 2)
  • 12V switchable phantom power
  • INPUT 3: 100V-Input for connecting PA-systems
  • Slave In, 6,3mm jack plug socket

Automatic Gain Control (AGC)

  • Dynamics:up to 36dB

Controls and indicators

  • Loop current adjustment via rotary control
  • Amplification control for INPUT 1, 2 und 3 via rotary control
  • Adjuster for the reduction of metal loss
  • Indicators:

Loop OK (LED, red)

Protect (LED, red)

Clip (LED, red)

ON / OFF (LED, blue)

  • AGC/Compression (2 green LEDs, 1 orange and 1 red LED)
  • Loop current (2 green LEDs, 1 orange and 1 red LED)


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