Theory Audio Design sb75 3-Channel Passive Soundbar

About The Theory Audio Design sb75 3-Channel Passive Soundbar

The Theory Audio Design sb75 3-Channel Passive Soundbar stands apart from the crowd with output, clarity, and dynamics that are nothing short of remarkable. Unlike most so-called soundbars, the sound from the sb75 feels expansive and immersive - detached from the speaker itself and completely enveloping. It delivers a big, cinematic audio experience that surprises with its precision and power.

Since its debut in late 2019, the sb75 - like all Theory soundbars - has earned near-universal praise from reviewers worldwide, many considering it the best you can buy. Specifically designed to match the width of 75” TVs, it delivers the widest bandwidth and highest output in its class. No other soundbar on the market comes close.

Its full-range performance is made possible by a rigid, extruded aluminium enclosure that’s just 96.5mm deep - or 100mm with the included wall brackets. Whether wall-mounted using the provided Z-clips or placed on furniture with the optional Table Top Stands, the sb75 offers flexibility without sacrificing style. Its slim profile, elegant curves, refined finish, and acoustically transparent fabric grille allow it to blend subtly into a room or stand out with understated sophistication. But ultimately, it’s the sb75’s sound that steals the show - you really do have to hear it to believe it.

The Theory of Everything: Theory is genuinely unique - their products have completely changed the level of performance attainable from small to medium size installed sound systems. Part of the way they attain this level of performance is by employing proprietary DSP techniques to process the signal for their loudspeakers and subwoof­ers with a very high degree of precision.

As such, the Theory ecosystem of products is a little different than what you're used to as all The­ory loudspeaker models require the application of Theory High Resolution Digital Loudspeaker Processing. For this reason, it is best to think of Theory loudspeakers as "active" or "powered" speakers - Theory have just elected to place the electronics, normally installed inside the loudspeaker itself, in rack-mountable chasses, outside the harsh environment of the loudspeaker, and where wiring and service of the electronics can be accomplished painlessly.

So, when configuring system designs, always pair your chosen Theory loudspeakers with appropriate Theory Amplified Loudspeaker Controllers. These highly powerful and flexible units will make deploying Theory systems simple and painless and will guaranty the best performance available for your application.

Applications

High Output Surround Sound Systems: Residential and commercial media rooms, TV rooms, gaming systems, home offices, and bedrooms

Background and Foreground Commercial Audio Systems: Bars and sports bars, restaurants, retail stores, hotels, houses of worship, screening rooms, lobbies, banks, museums and art exhibits, financial institutions, etc

Corporate Conferencing and Education: Executive offices, boardrooms, high-end conference rooms, lecture halls, classrooms, etc

Our Review

The Theory Audio Design sb75 3-Channel Passive Soundbar is no ordinary soundbar - it’s a powerhouse of clarity, dynamics, and wide, room-filling sound that feels detached from the speaker itself. Designed to complement 75” TVs, it’s sleek and slim at just 100 mm deep (with brackets), but packs a serious punch that’s surprised more than a few reviewers since its launch in 2019. Built from rigid extruded aluminium and finished with an elegant fabric grille, it looks as refined as it sounds. What really sets it apart, though, is the proprietary DSP tech at the heart of the Theory ecosystem - tucked away in rack-mounted controllers that make these “passive” speakers feel more like high-end active systems. Whether in a media room, home office, or gaming space, the sb75 delivers a cinematic experience you have to hear to believe.

Main Features & Specifications

• Design: High Output Three-Channel Passive Soundbar for 75" TVs – Sold Individually
• Operation: Passive, Requires 3 Theory Loudspeaker Controller Amp Channels
• DSP Requirements: Requires Model-Specific Theory-Certified DSP Loudspeaker Processing
• Drivers
  • 6 x 5” (127mm) Theory Carbon Fibre Low Frequency Drivers
  • 3 x 1.4” (35.5mm) Theory AdvancedPoly™ High Frequency Compression Drivers
• Enclosure: Powder Coated and Anodized Extruded and Machined Aluminium, Fabric Grille
• Terminals: Twin Spring-Loaded Push Terminals
• Outdoor Capability: Indoor Use Only
• Mounting Points: Two Theory VersaSlot^TM T-Slots Running Full Width with 4 x M5 Captive Nuts
• Optional Table Top Stand
• Bandwidth
  • 54Hz - 23kHz, -6dB
  • 46Hz - 25kHz, -10dB
• Coverage: 125° Conical; 160° @ 10kHz, -12dB
• Sensitivity: 94dB (LF); 108dB (HF) SPL/2.83V/1m
• Power Handling:
  • 200W (AES)
  • 400W (Continuous)
  • 800W (Peak)
• Minimum Recommended Power: 50W RMS
• Maximum Output
  • 117dB SPL / 1m (based on AES power rating) per channel driven
  • >124dB SPL / 1m (peak) three channels driven
• Nominal Impedance: 4 Ohms
• Included Accessories: Theory Z-Clip Mounting Brackets (male and female) for Flat Surface Mounting
• Optional Accessories: sb Table Top Stand Kit
• Colour: Black
• Dimensions (WxHxD): 1,676 x 241 x 97mm
• Total Installed Depth: 100 mm Including Z-Clip Mounting Brackets
• Weight: 30.8 kg
• Manufacturer's Warranty: 5 Years. Does not include misuse.

Note: Features & Specifications Subject To Change Without Notice. E&OE.