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Theory Audio Design sb25 High Output Multi-Use Loudspeaker
You have never had such a compact and capable loudspeaker in your system design toolbox before.
The Theory sb25 is a wide-bandwidth, high-output multi-use loudspeaker, perfect for restaurants, bars, hotels, retail stores, houses of worship and anywhere high-resolution, high-fidelity background or foreground sound is needed.
Capable of astonishing range and output, the 3.8” deep sb25 is literally a jack of all trades and will have you rethinking how you incorporate sound in your next high-value project.
SMOOTH. ACCURATE. EXTENDED.
The sb25 Listening-Axis Frequency Response is remarkably flat and extended insuring the highest accuracy and highest-resolution available.
(SOUND)POWERFULLY GOOD.
The CEA2034 or “Spinorama” data encapsulates the performance of a loudspeaker in a typical room. The sb25 “Listening Window” and Sound Power responses are ruler-flat, exactly the response that delivers accurate timbre, unmatched detail and coherence to the listener’s ears.
ACCURATE ALL THE WAY TO NINETY.
The sb25 horizontal off-axis response is predictable and smooth all the way to 90 degrees.
OVERLAPPING CIRCLES.
The sb25 offers wide dispersion all the way to the very top audio octave. Everyone hears wide-band, detailed sound.
GAIN CONTROL.
The “Directivity Contour Plot” shows the speaker’s dispersion characteristics using color to represent output magnitude. A quick inspection of the sb25’s contour plot reveals its very wide, but very uniform dispersion.
LISTEN WITH YOUR EYES.
Here is the data shown in the Directivity Contour Plot shown again on a polar map, making it easier to “see” how the sound is dispersed from the loudspeaker itself. The 0° axis represents the axis perpendicular to the speaker baffle.. The sb25 coverage is very wide and uniform, all the way to the top audio octave: >120° at -6dB even at 12kHz! Everyone in a broad area receives full-range sound with delicate, extended treble response.
VERTICALLY UNCHALLENGED.
The sb25’s vertical directivity is wide and predictable - especially for a two-way speaker with multiple LF drive units - making it easy to get uniform, broad-band coverage in every listening location.
PIVOT. POLE. PAN. TILT. ADAPT.
The sb25 ships with z-clips for flat-to-wall mounting.
The sb25 Universal Mount Adapter optional accessory facilitates the mounting of the sb25 in any scenario: pole from ceiling, pole from ground, onto any 75mm or 100mm VESA mount, and a number of pan-and-tilt and ball mounts for wall and ceiling mounting from Adaptive Technologies and Omnimount.
TAKE A STAND.
The sb-STAND stand accessory for Theory sb model soundbars and surface mount speakers allows the sb25 to stand up on a flat surfaces such as speaker stands, mixing desks, consoles, tabletops and bookshelves.
WATT RECOMMENDS
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Professional Reviews 91/100
Deliciously Crispy
Sound Quality
92/100
Build Quality
95/100
Value for Money
86/100
Compact yet startlingly dynamic, the sb25 delivers clean, weighty mids, crisp highs, and bass that reaches far deeper than its shallow cabinet suggests. Vince Hanada found it played loudly with tight, revealing detail and strong imaging, while Ian White praised its reference-level clarity and cinematic scale, making it a standout on-wall choice for serious, space-conscious systems.
What Reviewers Are Saying
Pros
Remarkably dynamic and able to play loudly with effortless control, giving small cabinets a much larger-room sound.
Tight, extended bass for an on-wall speaker, with enough low end that a subwoofer isn’t always necessary.
Excellent imaging and separation, with precise placement of instruments and convincing spatial focus.
High build quality, using heavy-duty aluminum construction that feels far more premium than typical wall speakers.
&
Cons
Its high-frequency presentation can be a bit lively in reflective or very live rooms.
It really wants the matching Theory amplifier-controller to show its full performance, which raises system complexity and cost.
SOUND QUALITY PERFORMANCE 92/100
Reviewers consistently describe the sb25 as a serious performer with a big, confident sound for its size. It comes across as neutral to slightly lively, with strong bass reach, excellent clarity, convincing imaging, and the ability to play loudly without sounding strained.
Bass
91/100
For a compact on-wall speaker, the sb25 gets unusually full and controlled bass. One reviewer said it produced enough bass extension that a subwoofer was not mandatory, while another described the bass as tight and comparable to a typical large bookshelf speaker, with each bass note clearly defined.
Mid
92/100
The midrange is described as clean, bold, and easy to follow, especially on dialogue and vocals. Reviewers mention strong intelligibility and good weight, with no sign of muddiness or crossover discontinuity in normal use.
Treble
90/100
High frequencies are described as very revealing and highly resolving, with reference-level clarity in one review. One listener noted a slight emphasis up top, but the overall impression is of detail and openness rather than glare.
Soundstage Imaging
93/100
Imaging is a clear strength, with instruments placed precisely and the speaker disappearing well in the room. Reviewers also describe a seamless blend through the crossover and a convincing sense of space for a speaker of this type.
Dynamics
94/100
The sb25 is repeatedly praised for being remarkably dynamic and able to play loudly and effortlessly. Reviewers talk about realistic snap on drums, tight transient response, and a level of punch and scale that feels bigger than the cabinet suggests.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
95/100
The cabinet and finish draw strong praise, with reviewers calling out the extruded and machined aluminum construction and the absence of cheap-feeling materials. The speaker is described as very heavy and built to a much higher standard, with a sense that it is made to last a long time.
Value for Money
86/100
Value comments are positive but qualified by the need for the matching amplifier-controller, which raises the real system cost well beyond the loudspeaker alone. At the speaker level, one reviewer felt it competed well with comparably priced bookshelf speakers, while another said the broader Theory system was worth the money in its class, though not a casual purchase.
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Authorized dealers for Theory Audio Design sb25 High Output Multi-Use Loudspeaker
- Audio Advice — online and in-store — Raleigh, North Carolina, United States (website)
- Audio Video Excellence — in-store — Scottsdale, Arizona, United States (website)
- AVIQ Huntsville — in-store — Huntsville, Alabama, United States (website)
- Brian's Custom Theaters & Hi-Fi — in-store — Nashville, Tennessee, United States (website)
- Gramophone - USA — online and in-store — Timonium, Maryland, United States (website)
- Hanson Audio Video — in-store — Dayton, Ohio, United States (website)
- Reference Media — in-store — Bellingham, Washington, United States (website)
- Sky by Gramaphone — online — United States (website)
- Tivoli Hi-Fi — online and in-store — Hawthorn East, Victoria, Australia (website)
- World Wide Stereo — online and in-store — Houston, Texas, United States (website)
and 1 more verified dealer