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C5-1 Perimeter hearing loop driver

The C5-1 Series hearing loop drivers from Ampetronic mark a substantial development in assistive listening technology. C Series units feature digital signal processing and networking functionality, and enable fast, accurate setup and adjustment via a very simple and easy to use user interface.

Ampetronic has engineered the C Series to offer the high end performance, consistency and certainty of results usually associated with top of the range hearing loop drivers, all for the price of a mid-range amplifier. Class ‘D’ drivers built into the C Series ensures low running and maintenance costs.

Network versions enable installers, technicians and facilities managers to remotely control the driver and monitor its condition status along with resistance and induction measurements. Fault condition alerts via email or Telnet provide reassurance that an operator will be informed of any issues with performance delivery.

The C5-1 features 5 Amps RMS current loop output, plus ample voltage headroom, making it suitable for a wide range of applications. Installation can be performed with total confidence; unique, multi-stage filtering ensures compatibility with other systems and global EMC regulations. These products are 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 IEC TR 63079.

C5-1 Series hearing loop drivers applications include:

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

Product Code:
C5-1N (networkable)


You can also select from:

Perimeter loop drivers
C5-1 – ~5ARMS output, single channel, 20VRMS
C7-1 – ~7ARMS output, single channel, 20VRMS

MultiLoop drivers
C5-2 – ~5ARMS output, two channels, 20VRMS
C7-2 – ~7ARMS output, two channels, 20VRMS

  • Features
  • Specifications
  • Standards
  • Downloads
    • Simple digital interface enabling accurate adjustment
    • Highly energy efficient Class-D amplifiers with low heat dissipation providing low running and maintenance costs
    • Networking with browser interface for remote reporting, adjustment, active status monitoring and remote fault reporting via email or Telnet
    • Built-in test tones – controllable with LoopLink
    • Automatic Gain Control
    • Compact 1U rack mount unit with internal transformer for simple rack installation
    • Optimised for speech frequencies with unmatched intelligibility and capable of high quality musical reproduction
    • Industry standard Phoenix connectors
    • Data compliant with IEC 62489-1 Standard
    • 100V line input


    Perimeter Loop Systems m2

    Perimeter Loop Systems m2
    Driver Metal loss Perimeter loop
    C5-1 none 240
    moderate Max 5m width
    C5-2 none 2 x 240
    moderate Max 5m width
    C7-1 none  460
    moderate Max 5m width
    C7-2 none 2 x 460
    moderate Max 5m width


    MultiLoop Array Systems m2

    MultiLoop Array Systems m2
    Driver Metal loss Loss Control MultiLoop Low Spill MultiLoop

    none 1089 900
    moderate 342 256

    none 1089 900
    moderate 625 462
    high 289 210


    Indicative metal loss scenarios are based on: Moderate – Calculated using “Concrete with moderate reinforcement” mode in Loopworks Design. Typical loss allowance of 5dB. High – Calculated using “Profiled Steel Deck” and “Metal System Floor” modes in Loopworks Design. Typical loss allowance of 9dB. All calculations based on square rooms. Perimeter loop systems modelled as single-turn loops using 2.5mm² single wire. Loops installed at height (essential in larger rooms). Multiloop systems modelled as floor-level installations using 3.0mm² Flat Copper Tape. *Optimised


    Power 35/55/95W 230V AC nominal, 45-65Hz
    [120V option available]
    Fuse values: C5-1 120V – T630mAL | 230V – T315mAL
    Input 1 & 2 3 way 3.5mm euroblock screw terminal input (supplied) with
    a balanced microphone and line level operation. Switchable 250Hz low cut filter (network models only). Selectable via rear panel switch.
    Microphone / Line Microphone specification; 200 – 600Ω, sensitivity -67dBu.
    Selectable 24V phantom power on microphone only.
    Line sensitivity -42dBu
    100V Line 2 way 5mm euroblock screw terminal (supplied)
    100V sensitivity +7dBu


    Loop Output Drive Voltage 20VRMS (28Vpk) at maximum output current per channel
    Loop Output/Drive Current
    Drive Current: 5ARMS (7Apk) up to 60 seconds continuous 1kHz sine wave, peak >7A per channel.
    Cont. pink noise 2.3ARMS short term peaks >7A per channel.
    7ARMS (10Apk) up to 60 seconds continuous 1kHz sine wave, peak >10A per channel
    Cont. pink noise 3.3ARMS short term peaks >10A per channel.
    Loop Connectors 4 way 5mm euroblock screw terminal (supplied) for each output, for star-quad configured feed cables
    DC Output 2 way 3.5mm euroblock screw terminal Re-settable, fuse protected 12V 0.1A. Controllable to reflect amplifier status (network models only)
    Line Output 3 way 3.5mm euroblock screw terminal (supplied) post AGC balanced output


    Idle 1/6 peak Output Current (Speech) 1/3 peak Output Current (Pink noise) Full Power
    Driver  Channels Current (ARMS) Load Resistance (Ohms) AC In (W) BTU AC In (W) BTU AC In (W) BTU AC In (W) BTU
    C7-2 2 7.0 0.44 11 38 15 49 36 90 76 112
    C7-2 2 7.0 1.0 11 38 19 46 44 76 169 242
    C7-2 2 5.0 2.0 11 38 19 46 42 67 157 194
    C7-1 1 7.0 0.4 8 27 10 30 15 35 36 49
    C7-1 1 7.0 1.0 8 27 13 35 25 48 80 106
    C7-1 1 5.0 2.0 8 27 12 31 24 44 80 102
    C5-2 2 5.0 0.4 11 38 13 40 19 48 45 78
    C5-2 2 5.0 1.0 11 38 16 45 29 61 91 140
    C5-2 2 3.5 2.0 11 38 14 38 24 45 82 113
    C5-1 1 5.0 0.5 8 27 9 28 11 28 32 67
    C5-1 1 3.5 1.0 8 27 9 28 12 32 27 50


    Frequency Response 80Hz to 6.5kHz
    Distortion THD+N <0.3% 1kHz sine at full current
    Automatic Gain Control The AGC is optimised for speech. Dynamic range >36dB
    Metal Loss Correction Corrects system frequency response issues 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 (network models only).
    This does not compensate for signal loss from metal structures which can be significant.
    Phase Shift User selectable (web only) at 0° or 90° between outputs


    Status Tri-colour LED:

    • Solid GREEN = normal operation
    • Flashing GREEN = sleep or standby mode
    • Flashing RED = error
    • Flashing AMBER = firmware updating


    Size Full width 1U 19″ rack mount.
    Width 430mm Depth 190mm Height 44mm
    Mounting Options Freestanding
    1U 19″ rack mount (brackets fitted as standard)
    Weight C5-1: 2.5 kg
    C5-2: 2.8 kg
    C7-1: 2.8 kg
    C7-2: 3.1 kg
    Environment IP20 rated; 20 to 90% relative humidity; 0 to 35ºC
    Cooling Passive
  • These products are 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 IEC TR 63079. 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 performance reporting 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 MET Labs approved for sale in North America.

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