U, M12606-01 and M12606-02, unencased, permanent magnet loudspeakers with a 2-watt normal \(4-watt peak\) input. These loudspeakers are fungus-, and immersion-resistant, and have a voice coil impedance of 8 ?? 1 ohms. The cone and spider are made of polyamide-based phenolic material \(see 6.1\).

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MIL-DTL-12606E

3.4.5 Frequency response.

3.4.5.1 LS-445/U and M12606-02. When tested as specified in 4.7.6.1, the frequency response between 750 to 1,250 Hz shall be not

less than 95 decibels (dB) relative to 0.0002 dynes per square centimeter. The response levels between 300 to 7,000 Hz shall be within

the limits shown on figure 4, except that sharp peaks and dips may extend beyond these limits provided that the width of the extension is

not greater than 1/10 octave at the limit.

3.4.5.2 M12606-01. When tested as specified in 4.7.6.2, the frequency response between 750 to 1,250 Hz shall not be less than 93

decibels (dB) relative to 0.0002 dynes per square centimeter. The response levels between 400 to 6,000 Hz shall be within the limits

shown on figure 5, except that sharp peaks and dips may extend beyond these limits provided that the width of the extension is not

greater than 1/10 octave at the limit.