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Bose® DesignMax DM3C

3-1/2" commercial in-ceiling speaker (Black)

Item # 201BDM3CB

This compact in-ceiling speaker makes sure customers can hear background music and announcements clearly.

This compact in-ceiling speaker makes sure customers can hear background music and announcements clearly.

Item # 201BDM3CB

Ship date unknown

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About the Bose® DesignMax DM3C

Get a free system design

After we gather your information, we’ll send you a detailed system plan. It will include a link to a pre-filled shopping cart. Ordering is easy, and delivery is fast.

A compact speaker for tile ceilings

If your restaurant or office has drop ceilings, the Bose DesignMax DM3C in-ceiling speaker offers a compact, low-profile option for background music and announcements. It features a 3-1/2" woofer and a coaxially mounted 3/4" neodymium dome tweeter. A 170° conical dispersion pattern helps you get maximum coverage with relatively few speakers.

Designed for performance

The new DesignMax Series offers some helpful perks when it comes to audio performance. Dispersion Alignment System technology ensures optimum blending of high, mid, and low frequencies throughout the speaker's listening area. And custom Bose-designed drivers deliver flat frequency response without the need for additional DSP or EQ processing.

More benefits of DesignMax

DesignMax in-ceiling speakers offer faster, safer installation. The enclosure includes QuickHold spring-loaded mounting arms that hold the speaker in place so your hands are free to finish the installation. They also blend into your decor, with minimum-bezel grilles and a removable Bose logo. An adjustable tile bridge is included. When installing in new construction, a Bose rough-in kit (not included) can help you mark speaker locations.

Part of a customizable Bose system

The Bose DesignMax product line includes speakers that fit in different spaces but are designed to work together.

Our system designers can help you choose the right mix of products to customize a system that sounds amazing in your unique space.

Product highlights:

  • 3-1/2" woofer with coaxially mounted 3/4" neodymium dome tweeter
  • voiced for tonal consistency with other Bose® DesignMax components
  • 170° conical dispersion pattern
  • multi-tap transformer:
    • 70-volt taps at 3, 6, 12 and 25 watts
    • 100-volt taps at 6, 12 and 25 watts
    • 8-ohm bypass for use with standard home stereo equipment
  • 25 watts continuous program power at 8 ohms
  • frequency response: 85-19,000 Hz (-3dB)
  • sensitivity: 83 dB
  • adjustable tile bridge included
  • integrated steel back can
  • QuickHold spring-loaded mounting arms for easy, safe installation
  • 10" diameter x 6" depth
  • cutout diameter: 8-1/4"
  • weight: 5.9 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # 829708-0110

What's in the box:

  • 2 In-ceiling speakers
  • 2 Metal-mesh grilles (black) w/ attached safety lanyard
  • 8 Tile-rail sections
  • 4 Tile-bridge sections
  • Cardboard cutout template
  • Installation guide
  • Parts list

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More details on the Bose® DesignMax DM3C

Russ B.

Features & specs

Drivers per speaker 2
Woofer Size (inches) 3.25
Tweeter Size (inches) 0.75
System Frequency response 85-19k
Maximum SPL 103
Power Handling
Power rating 25W
Peak Power rating ---
Width (inches) 9-3/16
Height (inches) 5-7/8
Depth (inches) 5-7/8
Weight 5.9 lbs

Product Research


Overview: The Bose DesignMax DM3C is a high-performance, 70/100 volt, in-ceiling loudspeaker that has been designed for foreground music and speech reproduction in a wide range of installed applications, such as performing arts centers, houses of worship, retail stores, conference centers, hospitality venues, and more. The front baffle is made from durable ABS plastic, with a powder-coated, perforated metal grille, and is housed in a steel backcan. The DM3C features a 3.25" woofer with a coaxially mounted 0.75" neodymium dome tweeter, all mounted in a ported enclosure that can deliver high output with 170˚ of conical coverage and a frequency range down to 75 Hz.

Shared Voicing: Shared voicing across the entire product line allows Bose DesignMax loudspeakers to be integrated into the same system while maintaining consistent tonal quality.

70/100 Volt: The DM3C is rated for 25 watts RMS (100W peak) and can be used with both 70 and 100 volt systems. The in-ceiling speakers include an 8Ω bypass mode as well. An easy-to-change dial on the face of the speaker allows tap settings to be made without having to remove the speaker from its mount. The following tap settings are available:

  • 70 V: 3W, 6W, 12W, and 25W
  • 100 V: 6W, 12W, and 25W
  • 8Ω: Bypass

Connections: The DM3C features a 6-pin Euroblock (Phoenix) connector for attaching speaker wire. Each Euroblock terminal can accommodate wire from 18 AWG to 14 AWG and is accessible from the front of the speaker, allowing it to be wired while mounted. Each speaker's Euroblock connector includes a set of Output terminals for "daisy-chaining" multiple speakers. The 6-pin Euroblock terminals include:

  • In:
    • 70/100V: Positive (+)
    • 8Ω: Positive (+)
    • Com: Negative (-)
  • Out:
    • 70/100V: Positive (+)
    • 8Ω: Positive (+)
    • Com: Negative (-)

Mounting: The DM3C features Bose's patented QuickHold mounting system that includes three integrated mounting arms that swing outward when tightened from the front of the speaker, supporting the speaker against the back of the mounting surface. The DM3C speaker set also includes tile-rails and tile-bridges for mounting each speaker in drop-ceilings where extra support is necessary.

Grilles: Magnetically mounted grilles are included with the DM3C speakers, providing easy removal and access to the front of the speakers. Each perforated metal grille includes a rotatable logo and safety lanyard, and can be painted to match the surrounding decor.


  • Frequency Response (+/-3dB): 85Hz - 19kHz
  • Frequency Range (-10 dB): 75Hz - 20kHz
  • Power Handling: 25W RMS/ 100W Peak
  • Nominal Dispersion: 170˚ conical
  • Recommended High-pass Filter: 80 Hz high-pass with 24dB/oct filter
  • Sensitivity: 83dB SPL
  • Maximum SPL: 103dB
  • Nominal Impedance: 8Ω (transformer bypassed)
  • Transformer Taps:
    • 70 V: 3W, 6W, 12W, 25W
    • 100 V: 6W, 12W, 25W
    • 8Ω: Bypass
  • Drivers: Coaxially mounted 3.25" woofer and 0.75" tweeter
  • Enclosure: ABS baffle and steel backcan
  • Grille: Powder-coated, perforated steel. Magnetically attached.
  • Connectors: 6-Pin Euroblock (Phoenix) connector for Input and Output.
  • Dimensions:
    • Outer Flange Diameter: 9.175"
    • Grille Diameter: 10.07"
    • Mounting Depth: 5.68"
    • Cutout Diameter: 8.175"
    • Maximum Ceiling Thickness: 1.50"
  • Weight: 5.9 lbs. (ea./with grille)

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Looking for more?

Check out the next model in this lineup.

Bose® DesignMax DM5C
5-1/4" commercial in-ceiling speakers

Larger drivers and expanded performance

The Bose® DesignMax DM5C offers these features:
  • 5-1/4" woofer with 1" tweeter
  • frequency response: 70-17,000 Hz(±3dB)
  • sensitivity: 86 dB
  • slightly narrower 160° conical dispersion pattern