All information subject to change without notice.
©2011 Bose Corporation.
Bose and FreeSpace are registered trademarks of Bose Corporation
in the United States and other countries.
C_009529
Product Codes
FreeSpace DS 40F loudspeaker – Blk
PC 321278-0110, PC 321278-0130*
FreeSpace DS 40F loudspeaker – Wht
PC 321278-0210, PC 321278-0230*
FreeSpace DS 40F loudspeaker - 8 Ohm – Blk
PC 321278-0120, PC 321278-0140*
FreeSpace DS 40F loudspeaker - 8 Ohm – Wht
PC 321278-0220, PC 321278-0240*
* Compatible with Square grille accessory
(PC 323207-0210)
Accessories
DS 40F/DS 100F adjustable
tile bridge (pair) PC 323205-0010
DS 40F/DS 100F tile bridge
(6 pack) PC 041864
DS 40F/DS 100F rough-in pan
(6 pack) PC 041993
DS 40F/DS 100F
pendant-mount kit – Blk PC 041862
DS 40F/DS 100F
pendant-mount kit – Wht PC 041863
Square grille – Wht (pair) PC 323207-0210
Ceramic terminal and
thermal fuse kit (10 pack) PC 326668-0010
Replacement Parts
Grille – Blk PN 299570
Grille – Wht PN 299571
4.5" (114mm) driver
w/gasket PN 324015-001S
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 referenced to
the nominal impedance, and the level measured
at 1 meter. Resulting graph is smoothed by 0.05
octave band.
TECHNICAL DATA SHEET
FreeSpace
®
DS 40F
Loudspeaker
pro.Bose.com
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