MIL-DTL-10911/3C
Voice coil impedance:
Dash number 01 and 02: 4-8 ohms.
Dash number 03: 45 ohms (8 ohms nominal).
Dash number 04: 45 ohms nominal.
Voice coil size (dash number 01): .750 inch.
Frequency response range (common to all part numbers): 150 to 7,000 Hz.
Frequency response:
Dash number 01: 90 dB minimum at 1 kHz.
Dash number 02:
105 dB minimum within 150 to 1,000 Hz.
107 dB minimum within 1,000 to 7,000 Hz.
Dash number 03 and 04: 95 dB minimum at 1 kHz.
Magnet type (dash number 01): Alnico V, or equal.
Magnet weight (dash number 01): 3.2 ounces.
Solderability (dash number 01): Applicable.
Marking:
Part number: See figure 1.
Date code (dash number 01): Applicable.
Interchangeability: PIN M10911/3-02 is completely interchangeable with the LS-180/U.
Revision letters are not used to denote changes due to the extensiveness of the changes.
NOTE: Impedance variations may be accomplished by either the use of voice coils wound to meet the specified
impedance, or the installation of impedance matching transformers providing other performance characteristics
are not adversely affected.
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