MEDC DB20 Loudspeaker


Explosionproof speaker for hazardous areas

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DB20 Range – Loudspeakers – Up to 8 Watts

This range of loudspeakers, intended for use in potentially explosive atmospheres, has a power rating of up to 8 Watts and is suitable for use in the harsh environmental conditions found offshore and onshore in the oil, gas and petrochemical industries.

The body and cover are manufactured from a UV stable glass reinforced polyester. The flare is manufactured from UV stable ABS.

Stainless steel screws and mounting stirrup are incorporated to ensure a corrosion-free product.


  • Zone 1& 2 (and Zone 21 & 22 : IIC version) plus non-Ex use.
  • ATEX Approved.
  • Ex II 2G Ex de IIB T3/T4.
  • IIC Gas Group and Dust approved version available.
  • Brazilian (Inmetro) certified.
  • CUTR certified.
  • IECEx Approved.
  • IP66 & IP67.
  • Certified temperature: –50ºC to +70ºC*.
  • GRP corrosion-free flamepath.
  • 112dB(A) at 8 watts at 1 metre (IIB Version).
  • Power tappings via integral transformer.
  • Ratcheted swivel mounting stirrup.
  • Stainless steel fixtures.
  • 100V or 70V line and 8Ω versions available.
  • Earth continuity available.
  • 8 terminal option to facilitate ‘loop in and loop out’ wiring.
    *Temperature class relates to ambient temperature
    (see over)
Technical Specification
CertificationATEX, IECEx, CUTR, Inmetro, Russian Fire Approval
Flameproof & Increased SafetyATEX Ex II 2 G, Exde IIB T3/T4
Ex II 2 GD Exde IIC T4/T5
Area ClassificationZone 1, Zone 2 & non Ex-use
Certified Ambient Temperature–50°C to +70°C*
Ingress ProtectionIP66
MaterialBody and Cover:Corrosion-free GRP
Outer Flare: UV stable ABS
Mounting and Fixtures: Stainless Steel
OutputIIB Version: 103 dBA at 1W at 1 metre
IIB Version: 109dBA at 4W at 1 metre
IIB Version: 112 dBA at 8W at 1 metre
IIC Version: 100 dBA at 1W at 1 metre
IIC Version: 106 dBA at 4W at 1 metre
IIC Version: 109 dBA at 8W at 1 metre
Entries2 x M2O ISO + 1 x certified plug
Weight1.5kg (approx)
Terminals4 x 4.0mmas standard.

8 x 2.5mmoptional ATEX and IECEx only


Transformer Tappings @ 4W4, 2, 1, 0.75, 0.38, 0.2
Transformer Tappings @ 8W8, 4, 2, 1, 1.5, 0.75, 0.4
OptionsBody colour, tag & duty labels,
Transformer voltage

*Model Dependent


MEDC DB20 Loudspeaker