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HYPERSUB F-21 Subwoofer Delivers SPL Levels Over 120dB
The new HYPERSUB F-21 Subwoofer features a 21-inch, carbon-fiber woofer housed in a sealed-box design.
SAN RAFAEL, CA (February 23, 2026) — HYPERSUB™, a specialized brand engineered to define a new frontier in low-frequency bass reproduction, has introduced the HYPERSUB F-21, a reference-grade subwoofer engineered for immersive home theaters and high-performance listening rooms. The F-21 is a system that combines four sealed-box subwoofers—each built around a 21-inch, long-stroke carbon-fiber driver, with the HYPERSUB 422D rack-mount amplifier to deliver infrasonic extension to 20Hz and verified maximum linear output well above 120dB.
The F-21 system is purpose-built for modern residential cinema design. With DSP-controlled power (4 × 2,200W RMS) and integration support for Trinnov Waveforming and Dirac ART, the HYPERSUB F-21 is designed to install cleanly, calibrate predictably, and reproduce low frequencies with speed, control, and impact across every seat.
Built for Real Rooms, Proven by Data
The HYPERSUB F-21 is the expression of HYPERSUB’s “measured, not marketed” philosophy—hand-built in Canada and verified to a 1% performance tolerance, ensuring every unit measures within 1% of its reference design. With 2,000+ QC points per system, RP-22 alignment, AES75, and ANSI/CTA-2010B validation, its output and distortion specs are grounded in real data. HYPERSUB’s product development unites system-level design from Acoustic Frontiers with ODM transducer and amplifier engineering from Harbottle Audio—bringing together room-centric integration, LDLC (Low Distortion, Low Compression) validation, and precision-matched amplification.
The F-21 Delivers:
- Complete four-cabinet system powered by the HYPERSUB 422D amplifier (4 × 2,200W RMS), enabling precise calibration and dynamic headroom for large rooms.
- Measured output per F-21: Max linear SPL 122dB (AES75, 1m, free space) and 128dB broadband peak (ANSI/CTA-2010B, 1m, half-space).
- Bandwidth & alignment: Sealed-box design with a rated 20–200Hz (-6dB rel. 100Hz) response for full-bandwidth bass reproduction.
- Integration-first: Engineered to work with Trinnov Waveforming and Dirac ART to achieve seat-to-seat consistency and phase-coherent low-frequency arrays.
- Craftsmanship: Void-free birch plywood cabinetry with real-wood veneer, beveled-edge black finish; made in Canada.
- The HYPERSUB Standard: 1% Performance Tolerance; NWAA Labs verification; RP-22 alignment.
- Robust: 5 Year Warranty
Engineered Details Integrators and Audiophiles Will Appreciate
- Transducer: 21-inch neodymium, long-stroke driver (>3 inches of linear excursion) for deep, distortion-free bass.
- Form factor: 17-inch shallow depth (432mm) supports hidden or flush installations without sacrificing output.
- Amplification & I/O: 422D provides four balanced XLR inputs and four SpeakOn outputs; 10-band parametric EQ per channel (bell, low/high shelf, notch, all-pass), with low-/high-pass, level, delay, polarity, and limiting.
- System dimensions (per F-21 cabinet): 33-⅞ inches H × 25 inches W × 17 inches D; 101 pounds.
- Room-ready: F-21 is recommended for medium to large rooms and scales to very large theaters when combined with the F-24 DUO infrasonic module.
Why Multiple Subs Matter—And How F-21 Delivers
Today’s reference-level cinema and immersive audio demand multiple subwoofers to smooth modal behavior and maintain linear output across seats. The F-21 is designed as a mechanically and electrically coherent four-sub array, enabling integrators to achieve predictable RP-22 outcomes with modern room-correction platforms.
“The HYPERSUB F-21 was built to deliver a new reference standard for measurable precision and effortless integration,” says Nyal Mellor, system designer for HYPERSUB and founder of Acoustic Frontiers.
Availability & Dealer Support
The F-21 system is available now through hypersubwoofers.com.
Frontier systems include a 4-year warranty, extended to 6 years when calibration is performed by a certified HYPERSUB representative.
HYPERSUB supports its partners far beyond what typical spec sheets, CAD drawings, and owner’s manuals offer by providing the information and tools integrators rely on to achieve predictable results. We deliver detailed and accurate measured specifications, including independently measured frequency response and maximum SPL output at NWAA Labs, validated to both AES75 and CEA-2010 standards. We also strengthen a dealer’s ability to achieve defined RP22 performance levels through engineering services that model the in-room performance of the specified HYPERSUB system—predicting SPL capability, frequency response, low-frequency extension, and seat-to-seat consistency before a single cabinet is installed.
For specifications, media assets, and dealer inquiries, visit www.hypersubwoofers.com.
About HYPERSUB™
HYPERSUB builds reference-grade subwoofer systems that unite room-centric system design with ODM transducer and amplifier engineering. Engineered and handcrafted in Canada, every model carries a 1% Performance Tolerance Guarantee–ensuring each unit measures within 1% of its reference specification—backed by NWAA Labs verification and alignment with CEDIA/CTA RP-22. HYPERSUB systems are designed to become the foundation of today’s most demanding home theaters. Learn more at hypersubwoofers.com.
HYPERSUB Press Contacts:
KMB Communications
Katye McGregor Bennett: katye@kmbcomm.com
Bob Archer: bob@kmbcomm.com