MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq
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  • MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq - Image 1
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  • MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq - Image 5
Ampetronic

MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq

Product ID: MLD7
Brand: Ampetronic

View or buy the System Types Assistive Listening Systems - MLD7 MultiLoop Driver 2 x 6.4Arms for areas up to 840m sq from Ampetronic to discover other options and shipping details.

Description

 Ampetronic
MLD7 MultiLoop Driver   2 x 6.4Arms for areas up to 840m sq


The MLD7 is part of the new benchmark range for professional audio induction loop systems. The elegant, sturdy units feature the most compact and most robust design on the market, requiring only a single 19” rack mount.

The MLD7 is capable of driving a wide variety of multiple loop configurations from multiple simple loops to phase shifted array systems for the most challenging requirements.   With an Ampetronic MultiLoop™ Low Loss design, the MLD7 will drive an area up to 840m2, or can be used to drive two perimeter looped areas of up to 700m2 each.

Designed to provide optimum efficiency and ample current for standard compliant field strength, coupled with unmatched voltage headroom to ensure crystal clear sound reproduction without clipping or distortion at practical loads. MLD units are built to our exacting standards and are backed by our 5 year warranty.


MultiLoop™ Applications

The flexibility of Ampetronic MLD units allows each output channel to drive separate loops, or two drive two overlaid loop patterns, with or without the selectable phase shift between the two channels.

Two separate simple area loops (or perimeter loops) can be driven at the same phase or with 90° phase shift. This can be used to cover large areas with no metal losses, or multiple different areas in the same facility.

Two loop layouts can be driven configured as multiple loop segments with or without phase shift. Simple array, low loss array or low spill array designs can create different performance to optimise field strength
over any area, and minimise loop ‘spill’ for adjacent systems or for confidentiality.

Most commonly used design types are low loss and low spill:

MultiLoop™ Low Loss Systemsare used to:

  • Compensate for high losses due to metal structures
  • Drive large areas where perimeter loops cause too much variation

 

MultiLoop™ Low Spill Systems are used to:

  • Perform the same tasks as a Low Loss systems, but also minimise ‘spill’
    – confines signal to within 1.5m of looped area, suitable for adjacent rooms e.g. cinemas, classrooms, or confidential applications.

 

Maximum area coverage for MLD7 MultiLoop™ systems (m2)

Loop DesignNo Metal Loss*Moderate Metal Loss**High Metal Loss***
Low Loss840300170
Low Spill500190130
Perimeter Loop @ 1:1 Aspect Ratio2 x 420max 5m loop widthn/a
Perimeter Loop @ 3:1 Aspect Ratio2 x 700max 5m loop widthn/a

Typical scenarios are based on *a building with no structural metal, **a building with reinforced concrete (re-bar) construction.

Features

  • Drives 2 output channels at 6.4ARMS each, featuring accurate and stable 90° phase shift
  • Up to 840m2 MultiLoop™ area coverage
  • Upto 2 x 700m2 Perimeter Loop area coverage
  • Space saving 1U rack mount unit, the most space efficient loop driver available
  • Front inlet & rear exhaust fan cooling for true rack mount integration
  • Rack mount or free standing installation
  • Can be used with or without phase shift to drive independent loops
  • Optimised to reproduce speech frequencies with unmatched intelligibility
  • Supreme musical reproduction
  • Automatic Gain Control
  • Metal loss correction
  • Active loop error monitoring & dual loop fault detection at start-up
  • Versatile input selection
    • 2 x XLR balanced mic / line switchable inputs
  • Low lifetime cost
    • Based on proven technology to ensure excellent reliability
    • 5 year warranty
  • Tested to, and compliant with: IEC 62489-1 induction loop amplifier performance standard
  • Free technical support
 
Applications include
  • Conference facilities
  • Stadia & Sports Halls
  • Cinemas & Theatres
  • Courts & Confidentiality
  • Classrooms & Lecture Halls
  • Airports & Railway Stations
 
Equipment supplied as standard
  • Handbook and installation instructions
  • 197 x 252mm loop system present sign (deaf logo)
  • Region specific mains cable
  • Loop connector for each output
  • Rack mount brackets
  • Status Connector
  • DC Connector
 
MLD7 optional accessories

Ashton Audio can supply a range of accessories to meet the specific needs of your installation:

Installation Accessories

  • 18mm x 0.25mm copper tape
  • PVC extrusion to protect copper tape
  • Installation / warning tape to fix cable or tape to a floor
 
Input adaptors

By using the appropriate input adaptor or preamplifier the MLD7 will accept multiple additional inputs or audio inputs from other sources:

Input TypeAdaptor
100V line input
Low impedance speaker line 
Line Level
ATT-UX transformer isolated attenuators
Unbalanced microphonesMAT1 adaptor


Standards compliance

This product is designed to form part of a system that can meet all of the requirements of the international loop performance standard IEC60118-4:2006, 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 market to all relevant safety and EMC standards, and is NRTL(ETL) approved for sale in North America.
For detailed information on approvals, standards compliance and how to interpret the technical parameters on Ampetronic datasheets, please visit the support section of our website or contact support@ampetronic.com.

Specifications

 

INPUTS
Power160W 230V AC nominal, 45-65Hz [120V option available]
Power switch & LED indicator (Hearing Loop logo) on front panel
Input 1 & 2 
Programmable Microphone / Line
XLR balanced input with programmable 15dB gain boost switchable between microphone and line on the rear panel.
Microphone specification; 200 - 600Ω, sensitivity -55dBu.
Selectable 12V phantom power on microphone only
Line sensitivity; -30dBu
Screwdriver adjustable front panel recessed gain control

 

OUTPUTS
Loop Output Drive Voltage17Vrms (24Vpk) at maximum output current per channel
Loop Output6.4Arms (9Apk) continuous 1kHz sine wave peak >9A per channel
Drive Current
  • Cont. pink noise 3.2Arms short term peaks >13A per channel
  • Front panel recessed controls
  • Drive current indicated on two 6-LED displays in 3dB increments
Loop ConnectorsNeutrik NL4 Speakons (supplied) for each output
Loop MonitorProvides access to monitor actual loop current via a 3.5mm stereo headphone connector on front panel
Channel A on left, channel B on right
StatusA pair of isolated relay contacts to indicate system status;
fault = open circuit: system O.K. = short circuit
DC OutputResettable, fuse protected 12V 0.1A.

 

AUDIO SYSTEM
Frequency Response80Hz to 6.5kHz
DistortionTHD+N
Automatic Gain ControlThe AGC is optimised for speech. Dynamic range >36dB
Metal Loss CorrectionCorrects system frequency response due to metal structures in a building.
Gain constant at 1kHz, adjustable gain slope from 0 to 3dB per octave.
This does not compensate for signal loss from metal structures which can be significant.
Phase ShiftUser selectable at 0° or 90° between outputs

 

ADDITIONAL FUNCTIONS
Fault MonitoringFault indicators on the front panel;
  • Clipping – delivering over the rated voltage (per channel)
  • Temp – unit is too hot (temporarily mutes output signal)
  • Loop error – short circuit / open circuit error (per channel)
Status ContactA pair of relay contacts are provided for remote fault monitoring
CoolingTwin variable speed fan cooled. Front inlet, rear exhaust.

 

PHYSICAL
SizeFull width 1U 19" rack mount.
Width 430mm Depth 250mm Height 44mm
Mounting OptionsFreestanding
1U 19" rack mount (brackets included)
Weight4.77kg
EnvironmentIP20 rated; 20 to 90% relative humidity; 0 to 35ºC
 



Ashton Audio in conjunction with Ampetronic can design your induction loop system for you.  Simple induction loop designs are free, complex array systems will be charged for at a nominal rate.  You can request a design through our 'Contact Us' Enquiry Form.

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