Bose FreeSpace DS40F Loudspeaker -White

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 Loudspeaker 

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