Theory Audio Design sb65 High-Output Three-Channel Soundbar

The Theory Audio Design sb65 is a high-performance, three-channel passive soundbar engineered to deliver the dynamics and clarity of a dedicated home theater system in a streamlined architectural design. Purpose-built to complement 65-inch televisions, the sb65 combines six 5-inch carbon-fiber woofers and three 1.4-inch compression drivers in a slim aluminum enclosure.

Unlike conventional powered soundbars, the sb65 features three independently enclosed left, center and right channels, each driven by a dedicated Theory amplified loudspeaker controller channel. With wide 125-degree dispersion and output exceeding 124 dB SPL with all three channels driven, it delivers an expansive cinematic presentation while maintaining a discreet appearance beneath a television.

Theory Professional

Three Independent Channels for Home Theater

The sb65 houses three separate sealed loudspeaker enclosures, providing dedicated left, center and right audio channels within a single cabinet. Each channel incorporates two 5-inch Theory carbon-fiber low-frequency drivers and a 1.4-inch Advanced Polymer high-frequency compression driver.

This configuration provides the separation required for stereo imaging and clear center-channel dialogue, while eliminating the need for three individual front speakers.

When paired with compatible Theory amplification and model-specific DSP processing, the sb65 is designed to reproduce movie soundtracks, television dialogue and high-resolution music with the dynamic capability of a larger home theater speaker system.

High-Output Performance and Wide Dispersion

The sb65 is engineered for substantial output without sacrificing architectural simplicity. Each channel supports 400 watts of continuous power handling and 800 watts peak, with a maximum output of 117 dB SPL at one meter.

With all three channels driven, the soundbar can exceed 124 dB SPL, providing considerable headroom for demanding movie soundtracks and high-impact entertainment.

Its 125-degree conical coverage helps maintain consistent tonal balance across a broad seating area, making it suitable for living rooms, dedicated media rooms and luxury residential theaters.

Theory Professional

Slim Aluminum Enclosure for 65-Inch Displays

Measuring 57 inches wide and just 3.8 inches deep, the sb65 is proportioned to complement a 65-inch television.

Its powder-coated and anodized aluminum enclosure combines structural rigidity with a refined architectural appearance. A black fabric grille provides a clean finish suitable for contemporary entertainment spaces.

Included Theory Z-Clip brackets allow the soundbar to mount directly against a flat wall, resulting in a total installed depth of approximately 3.93 inches. An optional sb-STAND accessory supports placement on television consoles, tabletops and other suitable flat surfaces.

Dedicated Theory Amplification and DSP

The sb65 is a passive loudspeaker system that requires three channels of compatible Theory loudspeaker controller amplification.

Model-specific Theory-certified DSP processing provides the equalization, crossover management and loudspeaker protection required for the system's intended performance.

The soundbar can be incorporated into a larger surround sound installation with additional Theory architectural loudspeakers and subwoofers, allowing a cohesive home theater system without conventional floorstanding front speakers.

Technical Specifications

Theory Professional

Key Features

• Three independent left, center and right speaker channels

• Six 5-inch carbon-fiber low-frequency drivers

• Three 1.4-inch Advanced Polymer compression drivers

• Designed to complement 65-inch televisions

• Greater than 124 dB SPL with all three channels driven

• 400 watts continuous and 800 watts peak power handling per channel

• Wide 125-degree conical coverage

• Three independent sealed enclosures

• Slim, 3.8-inch-deep aluminum cabinet

• Black fabric grille

• Integrated Theory VersaSlot mounting system

• Included Z-Clip wall-mounting brackets

• Optional sb-STAND for tabletop placement

• Requires three channels of Theory amplification and model-specific DSP

Installation and System Integration

The included Z-Clip mounting brackets provide a low-profile wall installation, while the optional tabletop stand offers an alternative for systems built around an entertainment console. The sb65 can also serve as the front three channels of a larger Theory surround sound system.

Theory Professional

Custom Home Theater Design at The Grid HiFi

Discover Theory Audio Design at The Grid HiFi in Houston, Texas. Our team designs and installs premium home theater systems that combine high-performance sound with clean architectural integration.

Whether you're upgrading a living room entertainment system or creating a dedicated private cinema, The Grid can integrate the Theory sb65 with compatible amplification, subwoofers, surround speakers and Control4 automation for a complete entertainment experience.