The MR Series speaker consists of a BK series balanced armature motor driving a large paper-stiffened diaphragm, and an MR waterproof bellows assembly. The MR bellows provides the waterproofing, and is rated to 50 feet (about 15m) of submersion. The grill has openings large enough to drain water quickly, so the speaker can operate immediately after removal from water. The MR diaphragm assembly (pictured) allows sound to pass and air pressure to equalize.
Features
Highly waterproof, no loss of performance after immersion in 15m water
Corrosion resistant
Withstands explosive decompression
Excellent environmental performance
Leads attached
High resistance to mechanical shock