Bose FreeSpace DS 40SE Technical Data Sheet page 8

FreeSpace DS 40SE
®
Loudspeaker
How our Loudspeakers are
Measured
1. Power handling
Full-bandwidth pink noise, meeting the IEC
Standard #268-5, is applied to the loudspeaker
and amplified to a level at the loudspeaker
terminals corresponding to the power handling
of the loudspeaker. The loudspeaker must show
no visible damage or measurable loss of perfor-
mance after 100 hours of continuous testing.
2. Sensitivity
Full-bandwidth pink noise is applied to the loud-
speaker with its active equalization curve and
amplified to a level at the loudspeaker terminals
corresponding to 1 watt as referenced to the
nominal impedance. The average sound pressure
level (dB-SPL) is measured at 1 meter from the
speaker in an anechoic environment.
3. Maximum SPL
Full-bandwidth pink noise is applied to the loud-
speaker with its active equalization curve and
amplified to a level at the loudspeaker terminals
corresponding to the long-term rated power
handling of the speaker. The average sound
pressure level (dB-SPL) is measured at 1 meter
from the speaker in an anechoic environment.
4. Frequency range
Sine waves are injected into the loudspeaker,
and the level is adjusted to 1 watt, as refer-
enced to the nominal impedance, and the level
measured at 1 meter. Resulting graph is
smoothed by 0.05 octave band.
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p r o . B o s e . c o m
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