MIL-L-16225B, MILITARY SPECIFICATION: LOUDSPEAKER, PERMANENT MAGNET, BLASTPROOF AND SUBMERSIBLE, NAVY TYPE 49546( ) (12-JAN-1961) [S/S BY MIL-DTL-16225C]

MIL-L-16225B, MILITARY SPECIFICATION: LOUDSPEAKER, PERMANENT MAGNET, BLASTPROOF AND SUBMERSIBLE, NAVY TYPE 49546( ) (12-JAN-1961) [S/S BY MIL-DTL-16225C]., Inactive for new design after 26 August 1999. This specification covers a blast proof, submersible loudspeaker unit capable of reproducing audio signals, when operated in conjunction with Naval communications receiving sets and associated audio frequency amplifiers.