Bose Professional DesignMax DM3C In-Ceiling Loudspeakers (Black, Pair)

Bose Professional DesignMax DM3C is an in-ceiling loudspeaker pair designed for indoor commercial audio installations. It enables full-range sound reproduction for system designers and integrators, supporting distributed background and foreground audio workflows. This makes it ideal for spaces where consistent coverage and discreet ceiling integration are required.

The loudspeakers operate using coaxial two-way drivers with a passive crossover and the Dispersion Alignment system. They support low-impedance operation as well as 70V and 100V distributed systems through selectable transformer taps. Installation is performed using QuickHold spring-loaded mounting arms for ceiling applications.

The system supports applications that require clean aesthetics and uniform sound distribution. It is suited for retail, hospitality, worship, and conference environments. The design allows integration with compatible Bose Professional electronics and accessories.

Key Features

• Coaxial two-way design: Combines a 3.25-inch woofer and coaxially mounted tweeter for full-range reproduction
• In-ceiling installation: Designed for discreet ceiling mounting in commercial spaces
• Dispersion Alignment system: Matches woofer and tweeter coverage patterns for consistent listening experience
• QuickHold mounting: Uses spring-loaded mounting arms to reduce installation time
• Distributed audio support: Includes 70V and 100V transformer taps with bypass

Technical Specifications

Safety Agency Ratings
UL 1480A, in compliance with UL 2043 for plenum-space installation, NFPA 70 & NFPA 90A, CE-compliant

Colors
Black grille (similar to RAL 9005), paintable

Enclosure Material
Engineered-plastics front baffle with integrated steel-formed backcan

Environmental
Indoor only

Grille
Magnetically attached perforated steel, powder-coated finish, paintable, with safety tether

Ceiling Cutout
8.2 in (208 mm)

Logo
Rotatable, removable

Suspension/Mounting
(3) QuickHold spring-loaded mounting arms, (3) safety cable attachment points

Operating Temperature Range
0 °C to 50 °C (32 °F to 122 °F)

Product Dimensions (H×W×D)
10.0 × 6.0 (255 mm × 154 mm), loudspeaker diameter × depth
8.0 × 5.7 (205 mm × 144 mm), backcan diameter × depth

Net Weight
5.9 lbs (2.7 kg), loudspeaker with grille (single)
1.8 lbs (0.8 kg), tile bridge (single)

Shipping Weight
19.2 lb (8.7 kg), pair

Frequency Range (-10 dB)
75 Hz – 20,000 Hz

Coverage, Horizontal
135° conical

Coverage, Vertical
135° conical

Calculated Maximum SPL @ 1 m
98 dB

Nominal Impedance
8 Ω (transformer bypass)

Power Handling, long-term continuous
30 W

Power Handling, Peak
120 W

Recommended Signal Processing
Not required, Bose Professional EQ voicing and SmartBass processing available

Sensitivity (SPL/1 W at 1 m)
85 dB

Transformer Taps, 100V
6, 12 W, bypass

Transformer Taps, 70V
3 W, 6 W, 12 W, bypass

Crossover
1.8 kHz, passive 2-way crossover

Driver Protection
Recommended high-pass protection 80 Hz with recommended 24 dB/octave filter

High-Frequency
1 × 0.75 (20 mm) neodymium dome tweeter, coaxially mounted

Low-Frequency
1 × 3.25 (83 mm) woofer

What’s in the Box

(2) DesignMax DM3C loudspeakers
(1) cutout template
(2) tile bridges
(1) installation guide
(2) black grilles