REL S550 10" Powered Subwoofer

REL S550 10" Powered Subwoofer Key Features: 

• 10" CarbonAlloy™ high-amplitude driver – Delivers fast, deep, and articulate bass with natural decay for musical precision and cinematic impact.
• 550-watt Pure Class D amplifier – Provides sustained power, increased crest capability, and authoritative low-end performance in a compact chassis.
• Fully analog input filters with High Level integration – Ensure natural sound, seamless speaker integration, and musical cohesion.
• Premium design and build – Expanded cabinet, reinforced bracing, leveling adjusters, and optional wood grille enhance aesthetics, stability, and airflow.
• Optional Airship Direct™ wireless system – Transmits High Level and .1/LFE signals wirelessly without compromising speed, clarity, or authority.

Product Description: 

The S/550 serves as the entry point to REL’s Serie S lineup, embodying the speed, depth, and nuance that define the range. While the larger S/850 sets the ultimate reference, the S/550 carries many of the same design innovations in a more compact chassis, ensuring the essence of Serie S is fully realized.
Its performance is striking—lightning-fast transients, deep and articulate bass, and tonal balance that brings both music and film to life. By blending authority with refinement, the S/550 is an ideal choice for medium-sized systems, delivering a genuine high-end experience that consistently exceeds expectations. For added warmth and individuality, an optional Premium Wood Grille is available to elevate both aesthetics and performance.

A Massive Step Forward

The S/550 showcases a design where every detail serves both beauty and purpose. Horizontal strakes carved into the side panels, elliptical returns that cradle warm golden-silver handles reminiscent of raw titanium, and subtle accents throughout create a cabinet that is larger—lower, wider, and deeper—yet visually lighter.
This expanded volume grants the drivers greater freedom and the amplifier improved efficiency, while reinforced internal bracing keeps resonance under control. Refined touches enhance the design: badges that disappear into the grille cloth, silver accents that sit flush within the cabinet plane, and model numbers etched discreetly into the front rails, revealed only when stacked in a Line Array.
Practicality matches aesthetics, with front-rail leveling adjusters for easy setup on uneven floors and an optional Premium Wood Grille for added warmth and individuality. The result embodies REL’s philosophy—design that unites beauty, performance, and thoughtful usability.

Designed for Excellence

The S/550 showcases a design where every detail serves both beauty and purpose. Horizontal strakes carved into the side panels, elliptical returns that cradle warm golden-silver handles reminiscent of raw titanium, and subtle accents throughout create a cabinet that is larger—lower, wider, and deeper—yet visually lighter.

This expanded volume grants the drivers greater freedom and the amplifier improved efficiency, while reinforced internal bracing keeps resonance under control. Refined touches enhance the design: badges that disappear into the grille cloth, silver accents that sit flush within the cabinet plane, and model numbers etched discreetly into the front rails, revealed only when stacked in a Line Array.

Practicality matches aesthetics, with front-rail leveling adjusters for easy setup on uneven floors and an optional Premium Wood Grille for added warmth and individuality. The result embodies REL’s philosophy—design that unites beauty, performance, and thoughtful usability.

Drive Faster. Drive Better

The new S/550 10" high-amplitude driver has been completely re-engineered, retaining only its cast frame. Its CarbonAlloy™ cone, topped with a pure carbon fiber cap, delivers sharper attack and smoother decay, allowing notes to dissolve naturally into silence. A redesigned suspension provides greater travel, enabling it to harness the amplifier’s increased power with ease.

In practice, the driver feels supple and effortless, operating free of strain. Its lighter design reduces the amplifier’s workload while unlocking more power, allowing greater excursion and higher output than ever before. The result is bass performance that feels truly revelatory.

Amplified Excellence

The S/550 is powered by a 550-watt Pure Class D amplifier that outperforms its predecessor in every way. In practice, it delivers 600 watts of continuous power with ease, sustaining output for extended periods rather than brief bursts. Crest power has been increased by 50%, producing the fast, authoritative low end that defines the Serie S lineup—performance that far exceeds what the spec sheet suggests.

Premium polypropylene capacitors, borrowed from REL’s Reference models, are used in the input filters to open up the soundstage and enhance transparency. Built for both performance and durability, this amplifier is rugged and reliable, while the second-generation PerfectFilter™ ensures deep, articulate bass that is extraordinary for a subwoofer with such a compact footprint.

Analog Filtered to Perfection

REL employs fully analog input filters because it is the only approach that achieves truly natural sound. These filters are among the fastest ever designed for a subwoofer. At the center is REL’s renowned High Level Input, which connects directly to the speaker outputs of the main amplifier. Rather than drawing power, it carries the full sonic signature of the system, enabling seamless integration with the speakers—a hallmark praised by reviewers for decades.

When High Level isn’t an option, the same analog filter circuit is available via RCA and XLR low-level inputs, ensuring the speed, naturalness, and cohesion REL is known for. In theater or dual-purpose systems, High Level and .1/LFE inputs can be used together, delivering both the musical integration of High Level and the full cinematic impact of .1/LFE playback.

Serie S Line Array

REL Line Arrays are renowned for their expansive soundstage and dynamic performance, earning admiration across the high-end audio community. Designed to grow with the listener, they can start as a stereo pair, expand to four units, and ultimately form a six-unit stack for floor-to-ceiling authority. Precision mechanical couplers securely lock each upper module to the base, ensuring stability and seamless integration.

The S/550 serves as the perfect entry point into this world, delivering the speed, nuance, and scale that define Line Array performance. It provides a scalable foundation for music and home theater enthusiasts seeking the benefits of REL’s vertical bass architecture in medium-sized rooms. As additional units are added, the S/550 reveals greater depth and dimensionality—vocals gain presence, instruments bloom with lifelike realism, and cinematic effects hit with commanding impact. A state-of-the-art experience that grows with the system and the listener.

Wired For Sound…Wirelessly

Sometimes the best connection is no connection at all. While high-quality cables are standard in high-end systems, there are situations where running a wire is impractical, unsafe, or visually intrusive. REL addresses this with Airship Direct™, an optional wireless system that transmits wide-bandwidth signals carrying both High Level and .1/LFE simultaneously. Even at the scale and output of the S/550, Airship Direct™ preserves the speed, clarity, and authority that define REL. It enables seamless transitions between music and movies without touching a control, all through a single module that plugs discreetly into the rear panel and remains virtually invisible. Simple, direct, and uncompromised—Airship Direct™.

Specifications: 

Dimensions and Weight: 

Overall - W x H x D

17.5 x 14.75 x 19.75 in.

(445 x 372 x 500 mm)

Product Weight - 68 lbs. (31 kg)

What's in the box

• Serie S/550 Subwoofer
• Power Cord
• 32' Neutrik Speakon cable
• Cloth Grille
• Line Array Mounting Hardware
• User Manual and Warranty Information

*The Premium Wood Grille is NOT included in your subwoofer purchase but is available for purchase