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Instantly add the DB4B Loudspeaker Range Up to 25 W and 50,000+ more product series to your store or catalog  
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DB4B Loudspeaker Range Up to 25 W

Brand: Crouse Hinds
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The DB4B is a high power explosion proof loudspeaker, introduced as a replacement for the DB4 with improved intelligibility and acoustic performance. 

Certified for use in a wide range of temperatures (from -55° to +85° C) the Ex enclosure is manufactured from GRP with a rugged thermoplastic flare providing a corrosion free and aesthetically pleasing product.

The frequency response of the unit ensures that critical voice messages and general alarm tones are highly intelligible. 

The specific SPL figure for sensitivity is 1 W @ 1 m is 110 dB whilst at 1m the 25 W unit produces 124 dB, the 15 W unit 122 dB and the 8 W unit 119 dB.

Options include DC blocking capacitors for monitored systems, resettable fuses for compliance with marine regulations and a swivel bracket that gives the installer greater flexibility when positioning the unit. 

The short flare option is a worthy addition to the range offering a high SPL and wide dispersion angle in a compact unit.
Features
  • Ex d / Ex de IIC / IIIC T4/T5/T6
  • ATEX certified
  • IECEx certified
  • cULus certified
  • INMETRO certified
  • TR CU certified
  • SIL2 certified
  • DNV certified
  • CCOE certified
  • CCC certified
  • Certified temperature -55° to +85° C
  • IP66 & IP67
  • Optional Ex e terminal chamber
  • 124 dB at 25 W, 1 m
  • 8 W, 15 W & 25 W versions
  • Power tappings, via integral transformer
  • Frequency response 350 Hz - 8 kHz
  • Ex enclosure - Glass reinforced polyester
  • Flare - High impact thermoplastic polyester
  • Stainless steel mounting bracket and cover screws
  • Mounting bracket has ratchet facility as standard
  • Optional swivel bracket available

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Specifications

Brand

Certifications & Approvals

  • ATEX, IECEx, cULus, TR CU, CQST, INMETRO, SIL 2, DNV, CCOE, CCC

Area Classification

  • Zone 1, Zone 2 & Non-Ex Use

Ambient Operating Temperature

  • -55° to +85° C

Ingress Protection

  • IP66 & IP67

Material

  • Ex Enclosure - Flame Retardant, UV Stable Glass Reinforced Polyester
  • Flare - Flame Retardant, UV Stable Thermoplastic Polyester

Output

  • 110 dBA at 1 W at 1 metre

Transformer

  • 100 V line or 8 Ω
  • 124 dBA at 25 W at 1 metre (Long Flare IIC Version)

Entries

  • Blanking Plug Available
  • Up to 2 x M20 or 1/2” NPT

Weight

  • Ex d - 5 kg, Ex de 5.8 kg. Based on Long Flare with Transformer

Documentation

Certificates

Data Sheet

Schematics

User Manual

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