The DB4B is a high power explosion proof loudspeaker, introduced as a replacement for the current DB4 with improved intelligibility and acoustic performance.
Certified for use in a wide range of temperatures from -55ºC to +70ºC 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, 1W @ 1m is 113dB whilst at 1m the 25W unit produces 127dB, the 15W unit 125dB and the 8W unit 123dB.
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
Certified temperature -55ºC to +70ºC.*
IP66 & IP67/ NEMA 4X & 6.
Optional Ex e terminal chamber.
127dB at 25W, 1m.*
8W, 15W & 25W versions.
Power tappings, via integral transformer.
Frequency response 350Hz - 8kHz.
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.
Optional resettable fuse.
*Depending on version.
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Material: |
Ex enclosure - Flame retardant, UV stable, Glass reinforced polyester. Flare - Flame retardant, high impact, UV stable, thermoplastic polyester. (UV stability tested to ISO 4892 part 3). Hardware - Bracket, fixings and captive cover screws in 316 stainless steel |
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Fire Retardancy: |
Body - Glass reinforced polyester. V0 flammability rating. Outer Flare - Thermoplastic Polyester. V0 flammability rating |
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Finish: |
Body - natural black. Flare - natural black, natural red or painted as specified. (Black short flare painted black). |
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Rated Power: |
8W, 15W or 25W (other ratings available, contact MEDC). |
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Frequency Range: |
Frequency response 350Hz to 8kHz. 8W and 15W units are available for use @ 200Hz |
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Weight: |
Ex d/UL - 5.0kg, Ex de - 5.8kg. Based on long flare with transformer |
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Terminals: |
Ex d - 8 x 2.5mm² (4mm² solid conductor)/ 12AWG. Ex de - 8 x 4.0mm². |
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Labels: |
Optional duty and tag labels available |
