Bose Professional DesignMax DM8C-SUB In-Ceiling Subwoofer (Black)

Bose Professional DesignMax DM8C-SUB is a subwoofer designed for indoor commercial audio installations. It enables low-frequency reinforcement for system designers and integrators, supporting full-range DesignMax loudspeaker systems. This makes it ideal for spaces where controlled, consistent bass performance is required.

The subwoofer operates with an in-ceiling design using an integrated backcan and an 8-inch low-frequency driver. It supports both low-impedance operation and 70V or 100V distributed systems with selectable transformer taps. Installation is performed using the QuickHold mounting system for ceiling applications.

The system supports applications that require extended low-frequency response in distributed audio environments. It is suited for venues such as retail, hospitality, worship, and performance spaces. The design allows integration with compatible Bose Professional electronics and loudspeaker systems.

Key Features

• In-ceiling subwoofer design: Provides low-frequency reinforcement for commercial audio systems
• 8-inch low-frequency driver: Supports bass reproduction for DesignMax installations
• QuickHold mounting system: Reduces installation time for ceiling applications
• Distributed system support: Includes 70V and 100V transformer taps with bypass
• Indoor installation rating: Designed for use in plenum and interior ceiling spaces

Technical Specifications

Safety Agency Ratings
UL-1480A, S5591/ UL Listed, in compliance with UL2043 for plenum-space installation, NFPA70 & NFPA90-A, CE compliant

Colors
Black (RAL 9005), white (similar to RAL 9003), 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
13.8 in (349 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)
16.1 in × 10.0 in (409 mm × 255 mm), loudspeaker diameter × depth
13.4 in × 9.5 in (340 mm × 240 mm), backcan diameter × depth

Net Weight
21.9 lb (9.9 kg), loudspeaker with grille (single)
2.2 lb (1.0 kg), tile bridge (single)

Shipping Weight
28.5 lb (12.9 kg)

Frequency Range (-10 dB)
38 Hz – 115 Hz

Coverage, Horizontal
Omnidirectional below 200 Hz

Coverage, Vertical
Omnidirectional below 200 Hz

Calculated Maximum SPL @ 1 m
112 dB

Nominal Impedance
8 Ω (transformer bypass)

Power Handling, long-term continuous
180 W

Power Handling, Peak
720 W

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

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

Transformer Taps, 100V
40, 80, 150 W, bypass

Transformer Taps, 70V
20 W, 40 W, 80 W, 150 W, bypass

Crossover
80 Hz – 200 Hz via active crossover in DSP

Driver Protection
Recommended high-pass protection 40 Hz with recommended 18 dB/octave filter

Low-Frequency
1 × 8 in (203 mm) woofer

What’s in the Box

(1) tile bridge
(1) cutout template