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.