2.9. Electro-Acoustic Parameters
Loudspeaker mounted in adapter acc. to 2.13.
1. Rated impedance
Z:
R:
8Ω
2. Voice coil resistance
7.2Ω±10%
3. Resonance frequency
(measured @1ccm, 700mW)
f0:
650Hz±7,5%
1 mm p-p
73±2dB
4. Maximum usable excursion xmax
p-p:
5. Nominal characteristic sensitivity (calculated for 1W in 1m)
average from 2kHz to 4kHz
5.1. Measured characteristic sensitivity (at 700mW in 10cm)
average from 2kHz to 4kHz
91,5±2dB
6. THD
according chapter 2.8.
7. Rub & buzz (measured @ 10cm, 1ccm, 700mW (2.29Veff) < 65dBSPL (300Hz -1500Hz)
All acoustic measurements at 23±2°C
2.10. Power handling
Loudspeaker mounted in lifetime test device (1ccm back cavity, open front)
1. Max short term power
(1sec. ON / 60sec. OFF)
1000mW (RMS)
700mW (RMS)
(IEC268-1, 2nd order high pass filtered, -3dB at 900Hz, crest factor 2)
2. Max continuous power
(500h)
(IEC268-1, 2nd order high pass filtered, -3dB at 650Hz, crest factor 2)
©2011 Knowles Electronics
Page 12 of 21
Release – Revision: D
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