Bose FreeSpace DS40F Speaker -Black

Bose FreeSpace DS40F

Recommendations to retail stores, restaurants, bars, concourse, transportation facilities, resorts, hospitality venues, houses of worship, ballrooms. For indoor applications only.

Bose FreeSpace DS40F Ceiling Speaker 

Versatile, high-performance, full-range, flush-mount loudspeaker designed for foreground and background music and speech reproduction in a wide range of installed applications. High output and 125° conical pattern with a frequency range down to 70 Hz.


  • Full-range loudspeaker with a single 4.5" (114 mm) driver in a ported enclosure to deliver a 125° conical coverage pattern and clear, intelligible music and speech reproduction for flush-ceiling or pendant-mount applications
  • Integrated multi-tap transformer with innovative thumb wheel adjustment for easy-to-change tap setting from underneath the loudspeaker grille
  • Shortcan design allows installation in shallower ceilings with minimum depth of 6.4" (163 mm)
  • Shared voicing across entire FreeSpace DS product family enables DS 16, DS 40 and DS 100 loudspeakers to be integrated on the same system and maintain consistent tonal quality
  • Supported by a suite of accessories, including ceiling-mount bracket, adjustable tile bridge, pendant-mount kit and square grille


System Performance



Frequency Response (+/-3 dB)1

1 80 Hz - 17 kHz


Frequency Range (-10 dB)1

70 Hz - 19 kHz


Nominal Dispersion

125° conical


Recommended High-Pass Filter

70 Hz high-pass filter


Loudspeaker EQ



Overload Protection



Long-Term Power Handling2

40 W (160 W peak)


Sensitivity (SPL / 1 W @ 1 m)3

87 dB SPL


Maximum SPL @ 1 m4

103 dB SPL (109 dB SPL peak)


Nominal Impedance

8 Ω (transformer bypassed)


Transformer Taps (70/100 V)

70 V: 2.5 W, 5 W, 10 W, 20 W, 40 W 100 V: 5 W, 10 W, 20 W, 40 W





Driver Compliment

4.5" (114 mm) full-range driver






Polypropylene (front baffle), powder-coated steel (rear enclosure)



Powder-coated steel grille



Indoor use only



Three-terminal barrier strip; two-terminal barrier strip (8 ohm variant). Optional accessory available for use when ceramic connector and thermal fuse are required. Wire gauge: 18 AWG (0.8 mm) to 14 AWG (2.0 mm)


Suspension / Mounting

Three integrated quick-install mounting arms. Three mounting points at the rear of the enclosure for use with optional accessory pendant mount kit. Safety cable attachment: .35" (8.9 mm) diameter hole on junction box



Outer flange diameter: 11.8" (300 mm) Depth: 6.0" (153 mm) Ceiling hole diameter: 10.5" (267 mm)


Ceiling Thickness (Maximum)

2.5" (64 mm)


Net Weight

8.3 lb (3.7 kg) - with transformer

6.3 lb (2.8 kg) - 8 Ω variant

Shipping Weight

11.0 lb (5.0 kg) - with transformer

9.0 lb (4.1 kg) - 8 Ω variant

Product Code




321278-0130 - with transformer

321278-0140 - 8 Ω variant


321278-0230 - with transformer

321278-0240 - 8 Ω variant



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See Also : Ceiling Speaker, Bose