Special Features:

Has only 0.5% total harmonic distortion (thd); special automatic level control (atc) to insure constant audiolevel; can be connected to two military handsets/headsets (h-250/u or similar type); has automatic speaker muting when handset/headset are keyed; 9 to 36 vdc alternate power source compatibility; indicates dc power; night visiongoggles (nvg) compatible; audio input 1.6 vrms ; audio band pass 300 hz to 3000 hz

Properties:

A loudspeaker whose diaphragm movements are produced by a coil or iron armature moving in the field of a permanent magnet.