| Part Number | 40.333.056.01 |
LIGHTS DOWN.
LOWS UP.
The beauty beneath.
Low frequencies are the foundation of an unforgettable listening experience. The USW‑121P never steals the spotlight, yet remains essential to every show. It delivers depth you can feel—adding gravity, intimacy, and awe—and creates immersive moments that stay with your audience long after the lights come up.
Made to fit and fit to be heard.
With its distinctive angled-corner design and shallow 24.5” depth, the USW-121P delivers the extended low-frequency and dynamic range demanded by world-class performance spaces—built on technology proven in our 2100-LFC low-frequency control element.
Perfect for performance spaces where conventional cabinet designs make it challenging, it offers uncompromised power and clarity, all in a form that blends seamlessly into the environment. With easy access to cable connections thanks to its cut-corner design, it fits wherever you need it—whether tucked into a corner, under a stage, or flush against a wall.
Engineered for everywhere.
Fit for challenging spaces, with no rear connectors and an angled corner design.
Deep, powerful sound with a single 21-inch driver.
Performance made portable — flexible applications with no rigging required.
Equipped with GEN-1 technology for seamless connectivity and built-in processing.
Designed to complement and enhance full-range loudspeakers.
For the spaces where space matters.
From the concert hall to the cinema. From the pulpit to the proscenium. The USW‑121P delivers deep, powerful bass in places where traditional array subwoofers cannot be used. Built for the world’s most demanding acoustic environments. Spaces where sound must be both powerful and precise. The USW‑121P’s unique shape allows for discreet installation in venues that prize elegance as much as performance.
Complementary by design.
Performing arts centers and theaters
Deep, articulate low end that extends the musical response of your main system or delivers room-shaking effects.
Cinemas and screening rooms
The ultimate LFE channel—delivering visceral impact and linear performance, designed to pair seamlessly with any full-range screen channel solution.
Houses of worship
From ULTRA to line array systems, the USW‑121P brings powerful bass that fills the room and amplifies the impact of your sound.
Portable applications
Alone or with the LFC range, the USW‑121P brings low-frequency impact to point source and line array systems, with effortless deployment.
Theme parks
Bring seismic power to every experience, extending the response of distributed solutions or filling an area with ground-shaking effects.
The right fit for everyone.
Ideal for deployment across a wide range of applications, the USW‑121P is designed to support our entire loudspeaker ecosystem. Making this subwoofer a problem-solver for architects, installers, and audio engineers alike. Also, a smart option for rental houses seeking high-power, low-frequency extension without the cost or complexity of a flown array solution.
The details behind the depth.
Where geometry meets genius. Every angled corner and hidden detail is engineered to deliver power and precision in spaces once thought impossible. The USW-121P is also the first Meyer Sound subwoofer to feature Galileo Extended Networking (GEN-1) technology—bringing networked audio connectivity and GALAXY-class DSP directly into the loudspeaker. Instead of routing audio through external processors, GEN-1 streamlines your workflow and unlocks new levels of flexibility.
- Maximum linear sound level: 136 dBZpk
- Operating frequency range: 20 Hz - 125 Hz
- Dimensions: W 52”, D 24.5”, H 27.5”
- Weight: 198 lb (89.8 kg)
- Operating voltage range: 200-240 V AC, 50 Hz - 60 Hz
No bad angles.
Every detail, every side, every angle, engineered.
Lows that go where others can’t.
Discover deeper sound today. Learn more about the USW‑121P.
Low-end, uncovered. Deep sound, discovered.
Lows That Go Where Others Can't
As the largest model in a new generation of USW subwoofers, the USW-121P expands Meyer Sound’s heritage of low-frequency innovation into a broad range of applications. Drawing on the power and low-frequency precision of the LFC family but optimized for a deeper response, it delivers a powerful performance in a streamlined form factor.
Powerful, Efficient, Flexible
The USW-121P’s single 21-inch driver is powered by a powerful yet efficient Class D amplifier. With a wide frequency range of 20 Hz - 125 Hz and maximum linear sound level of 136 dBZpk, it provides extended low end to compliment any system. With AES67 and analog connectivity as standard, this subwoofer is ready to drop into a wide range of applications.
Maximum Power, Minimum Footprint
At just 24.5 inches deep, the USW-121P provides substantial low-end extension without sacrificing valuable floor or stage space. The distinctive corner cut-out allows for connector and cable clearance as well as space for cooling when the cabinet is against a wall or other tight spaces, including behind screens and in prosceniums.
Engineered for Connection
The USW-121P is the first Meyer Sound subwoofer to feature Galileo Extended Networking (GEN‑1) technology, which integrates networked audio connectivity and Galileo GALAXY-class DSP directly into the loudspeaker, reducing or eliminating the need for separate system processors. Calibration and deployment are simpler and more scalable as GEN-1 reduces or removes the need for separate system processors.
Versatility where you need it.
Streamlined System DesignWith optimized frequency and phase response, the USW-121P integrates seamlessly with Meyer Sound systems including the ULTRA family, line array, ASTRYA and HMS series of products. Extended low frequency response also means it can be used on the ground in partnership with flown LFC products. | Ready To IntegrateIts premium birch plywood enclosure provides an optimized acoustic volume and is coated in a rugged, black textured finish. Options include the OT specification for outdoor use as well as a version with no grill for integration behind screens or acoustic material. Custom color finishes are also available to help integrate full range power into any system design. | Monitoring Made EasyThanks to the integrated GEN‑1 technology, the USW-121P also features RPM (Remote Product Monitoring) data. Users can access performance parameters and DSP settings directly from a Mac or Windows PC while running Nebra software. |
Streamlined System DesignWith optimized frequency and phase response, the USW-121P integrates seamlessly with Meyer Sound systems including the ULTRA family, line array, ASTRYA and HMS series of products. Extended low frequency response also means it can be used on the ground in partnership with flown LFC products. | |
Ready To IntegrateIts premium birch plywood enclosure provides an optimized acoustic volume and is coated in a rugged, black textured finish. Options include the OT specification for outdoor use as well as a version with no grill for integration behind screens or acoustic material. Custom color finishes are also available to help integrate full range power into any system design. | |
Monitoring Made EasyThanks to the integrated GEN‑1 technology, the USW-121P also features RPM (Remote Product Monitoring) data. Users can access performance parameters and DSP settings directly from a Mac or Windows PC while running Nebra software. |
The Self-Powered Advantage
Meyer Sound has been pioneering self-powered loudspeakers for professional installations and touring since 1995. We’ve committed to self-powered systems because we know they deliver unrivaled clarity, reliable performance, value, and ease of use.
If you’ve been thinking about investing in a self-powered system, you’ve come to the right place.
First, a Little History...
The story of self-powered loudspeakers is in many ways the story of Meyer Sound itself.
In the 1970s, sound reinforcement technology was inconsistent science at best, and at worst, led to show-ending failures. A young John Meyer, designing loudspeakers for San Francisco’s McCune Sound Service, wanted to bring quality and reliability to sound systems, and he knew the answer lay in self-powered loudspeakers. In 1979 Meyer founded his own speaker company; early Meyer Sound innovations include the iconic HD-1 self-powered studio monitor launched in 1989.
Today Meyer Sound offers a full range of self-powered sound reinforcement products. Meyer Sound systems can be found on tour with artists ranging from Ed Sheeran to Metallica, on Broadway and London’s West End, and in performance venues from the San Francisco Opera to the Vienna Philharmonic not to mention sports stadiums, cruise ships, and houses of worship around the world.
Why Self-Powered?
Self-powered loudspeakers offer several advantages over their passive counterparts when it comes to fidelity, reliability, and simplicity. The great part is, you’ll start to reap the benefits of a self-powered system before you even power up.
Ease of deployment: System set-up is so much easier when you have fewer components and fewer cables to worry about being miswired. Since self-powered loudspeakers incorporate amplification, you’ll never have to deal with matching speakers to amplifiers or connecting components. You don’t have to worry about calibration of gain and crossover setting which means more time focusing on the show. Eliminating amp racks doesn’t just streamline system deployment, it streamlines your inventory whether you’re a rental house or a road warrior. And when you consider that the average amp rack weighs nearly 300 pounds and takes up four feet of truck space, the efficiencies get even clearer. Let alone when you want to fly the amplifier racks to get closer to the speakers, often requiring more rigging points and more motors.
Predictable, reliable operation: Internal amplification is closely matched to drivers. Because individual components have been optimized during manufacturing, you can expect consistent sound from show to show. Built-in, factory-optimized protection circuitry provides extra assurance without degrading signal quality. And, when you have less equipment, you have less risk of failure.
Better frequency and phase response: Because self-powered loudspeakers incorporate sophisticated processing, they are calibrated to exhibit optimal response curves in key performance parameters. Active crossovers are more precise, sophisticated designs, and bi-amped systems are time aligned, eliminating phase issues. The result? Accurate sound throughout the speaker’s range, at any volume level.
Unparalleled clarity: In powered monitors, internal amplifiers are precision-matched to drivers, delivering optimal power at all times for cleaner sound. And because amps are built into loudspeaker cabinets, there’s no need for long lengths of connecting cable, which can become prone to distortion and signal loss.
Tighter transients: Since self-powered loudspeakers have very short internal cables, amps inside can more effectively dampen driver mechanical motion, which leads to better sonic accuracy and tighter, crisper transients. (And, there’s none of the loss in levels and signal quality inherent over long cable distances.)
Certified Safe: Nothing matters more than the safety of your staff and customers. Because self-powered loudspeakers incorporate amplification, they must undergo rigorous testing by Underwriters Laboratories and other international organizations to ensure they operate safely and guard against the risk of fire, electric shock, and inadequate structural design. Enjoy peace of mind knowing Meyer Sound powered products are certified by FCC, UL, CSA, CE, and CEE the most stringent agencies in the business.
The Problems with Passive
What about passive loudspeakers? At first glance, passive systems may seem like a bargain. But we already know that passive systems require more components and accessories than powered systems. Sonically, they exhibit potential for signal loss over distances, and it is very hard to ensure consistent, optimal sound and volume as amplifiers have many variables to consider when being matched to loudspeakers, such as cable lengths and gauge as well as the number of speakers connected to the amplifier.
Passive systems are often touted as easy to service. But because powered loudspeakers are so complex to design and build, self-powered loudspeakers usually represent the top innovations from leading manufacturers. Better quality translates to better reliability, which means fewer maintenance issues in the long run.
At face value, passive systems might seem less expensive and easier to maintain. But once you start adding in amps, cables, and other components not to mention increased transport and labor costs you’ll find that those savings just don’t add up to a better value.
Step Up to a Self-Powered System
Once you recognize all of the advantages inherent in self-powered loudspeaker systems, it’s easy to understand why the world’s top venues and productions rely on them to deliver consistently stunning sound.
USW-121P Accessories
MCB-T2 CASTER BOARD KIT
USW-121P Caster Board kit. Holds two USW-121P subwoofers.
MFMK-T1 FLOOR MOUNTING KIT
Floor mounting kit includes 4 brackets and related fasteners.
| Part Number | 40.329.001.06 |