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Bose FreeSpace DS 40F
4.5" Full-Range Ceiling Loudspeaker with 70/100V Transformer or 8 Ohm Operation in White


The Bose FreeSpace DS 40F is the most versatile member of the DS loudspeaker family.
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The Bose FreeSpace DS 40F is the most versatile member of the DS loudspeaker family. It is a high-performance, full-range, flushmount loudspeaker designed for foreground and background music and speech reproduction in a wide range of installed applications. The DS 40F features high output and 125° conical pattern with a frequency range down to 70 Hz.

Bose FreeSpace DS 40F Features:

  • 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

Bose FreeSpace DS 40F Specifications:

  • System Performance:
    • Frequency Response (±3dB): 80 Hz - 17 kHz
    • Frequency Range (-10dB): 70 Hz - 19 kHz
    • Nominal Dispersion: 125° conical
    • Recommended High-Pass Filter: 70 Hz high-pass filter
    • Loudspeaker EQ: Recommended
    • Overload Protection: PTC/Resistor
    • Long-Term Power Handling: 40 W (160 W peak)
    • Sensitivity (SPL / 1 W @ 1 m): 87dB SPL
    • Maximum SPL @ 1 m: 103 dB SPL (109 dB SPL peak)
    • Nominal Impedance: 8 Ohms (transformer bypassed)
    • Transformer Taps (70/100 V):
      • 70V: 2.5 W, 5 W, 10 W, 20 W, 40 W
      • 100V: 5 W, 10 W, 20 W, 40 W
  • Transducers: 4.5" (114mm) full-range driver
  • Physical:
    • Enclosure: Polypropylene (front baffle), powder-coated steel (rear enclosure)
    • Grille: Powder-coated steel grille
    • Color: White
    • Environmental: Indoor use only
    • Connectors: Three-terminal barrier strip; 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: 0.35" (8.9mm) diameter hole on junction box
    • Dimensions:
      • Outer Flange Diameter: 11.8" (300mm)
      • Depth: 6.0" (153mm)
      • Ceiling Hole Diameter: 10.5" (267mm)
    • Ceiling Thickness (Maximum): 2.5" (64 mm)
    • Net Weight: 8.3 lb (3.7 kg)
Tile Bridge, 6 Pack,  Product Code: 041864
Bose DS100F-TILE-BRIDGE Tile Bridge, 6 Pack, Product Code: 041864
Designed for mounting DS 40F and DS 100F loudspeakers in hung tile ceilings.Product code: 041864
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Rough-In Pan, 6 Pack, 041993
Bose DS100F-ROUGHIN-PAN Rough-In Pan, 6 Pack, 041993
Designed for mounting DS 40F and DS 100F loudspeakers in new construction hard deck ceilings.Product code: 041993  
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Suspension Kit, 3-Point 41863
Bose DS100F-PENDANT-WH Suspension Kit, 3-Point 41863
Suspension hardware and loudspeaker cosmetic cover designed for hanging DS 40F and DS 100F loudspeakers from open ceilings. 
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