Rel S/550 Subwoofer

Rel S/550 Subwoofer is the entry point to the Serie S range, delivering the pace, depth, and subtlety that shape REL’s performance philosophy. While its larger relative, the S/850, sets the ultimate reference, the S/550 carries forward many of the same design breakthroughs—ensuring the essence of Serie S is fully embodied in a more compact structure.

The outcomes are astonishing: S/550 provides lightning-quick responses, profound articulate bass, and tonal harmony that infuses life into both music and cinema. Its ability to combine authority with elegance makes it an ideal solution for those seeking a genuine premium encounter in medium-sized environments, with performance that consistently surpasses expectations.

This balance of refinement and force highlights why the Rel S/550 Subwoofer is admired by audiophiles worldwide. Its design ensures the listener always experiences precision without compromise.

Crafted for Distinction

Observe the architecture as a whole: horizontal ridges sculpted into the side walls, graceful oval returns that support handles finished in a warm golden-silver, recalling raw titanium. Everywhere you glance, intentional details arise—but the mission is clear. This version achieves the seemingly unattainable: a larger case that is lower, broader, and deeper, yet visually lighter.

The increased internal capacity grants drivers more liberty and amplifiers enhanced effectiveness, while updated inner supports hold cabinet vibrations firmly in check. Subtler aspects also matter, insignias that fade into the grille fabric, silver highlights that sit quietly within the enclosure plane, and model codes etched discreetly into the front rails, noticeable only when stacked in a Line Array.

An optional Premium Wood Grille brings richness and individuality, while front-rail leveling adjusters ensure effortless installation, even on irregular floors. Together, these upgrades embody REL’s belief that excellent engineering is equally about practical usability as it is about aesthetics and capability.

This harmony of form and function turns every placement into an experience. Even the smallest detail contributes to the overall impression of sophistication.

Drive Smarter. Play Louder

The new S/550 10” high-amplitude transducer has been completely reconstructed—only the cast framework remains. Its CarbonAlloy™ cone, capped with pure carbon fibre, sharpens attack and smooths decay, enabling notes to fade naturally into silence. A redesigned suspension provides greater travel, easily handling the amplifier’s extra strength.

When listening, the driver feels supple and unforced, free from pressure. Because it’s lighter, the amplifier exerts less effort, yet delivers more output, allowing the driver to travel further and play louder than ever before. The outcome is nothing short of revolutionary.

This synergy between driver and amplifier allows effortless dynamics. It proves how intelligent design enhances both efficiency and enjoyment.

Power Refined

Rated at 550-watts, the Pure Class D stage outpaces its predecessor – but figures tell only part of the narrative. In REL’s laboratory, this unit supplies 600-watts constant with no stress for extended sessions, not simply for a brief moment. Its crest capacity is fully 50% greater than its predecessor. It produces the quick, profoundly deep bass Serie S is recognized for, results that outshine spec sheets. Premium polypropylene capacitors, like those used in REL’s Reference models, were installed in REL’s input filters producing a more open soundstage with stronger clarity. REL knows from extensive practice that this module is a durable and trustworthy amplifier. As always, powered by REL’s second generation PerfectFilter™, the deep bass is utterly extraordinary for a subwoofer whose size is so compact.

This ensures users enjoy consistent performance at any volume. REL proves once again that durability and sonic quality can coexist without trade-offs.

Analog Purity Perfected

REL selected analog because it is the only route to attain genuinely natural sound. All REL input circuits are 100% analog—among the quickest ever offered in a subwoofer. At the heart is REL’s celebrated High Level Input, which connects directly to the speaker outputs of your main amplifier. This doesn’t draw strength; instead, it carries the complete sonic fingerprint of your system, allowing REL to merge flawlessly with your loudspeakers—a feature reviewers have praised for years.

For setups where High Level isn’t possible, REL’s low-level input uses the same analog filtering circuit, available via both RCA and XLR links, to deliver the velocity, naturalness, and blending REL is recognized for. And in theatre or hybrid systems, REL uniquely enables High Level and .1/LFE to function together—so music benefits from organic integration, while films deliver the full impact intended by the mix.

Such versatility guarantees adaptability across varied system types. REL ensures the same sonic integrity regardless of connection method.

Serie S Vertical Array

REL Line Arrays are celebrated for their staging and dynamics, performance admired across the high-end sound community. Like all REL Arrays, they’re engineered to grow with the listener: begin with a stereo pair, expand to four, and ultimately construct a full six-unit tower for floor-to-ceiling authority. Precision mechanical couplers lock each upper unit securely to the REL beneath, ensuring stability and flawless alignment.

The S/550 is the perfect introduction into this world, delivering the pace, subtlety, and scale that define Line Array presentation. It offers a scalable platform for music and cinema fans eager to explore the rewards of REL’s vertical bass system in medium-sized spaces. As systems grow, the S/550 reveals even greater depth and dimension—vocals gain presence, instruments blossom with authentic realism, and cinematic effects strike with commanding power. A state-of-the-art adventure made accessible, with the capacity to expand over time.

This modular approach allows owners to build at their own pace. It demonstrates REL’s philosophy of future-ready performance.

Wireless Without Limits

Sometimes the finest cable is no cable. Quality wires are a staple in high-end sound systems, but there are moments when it is impractical, unsafe, or unattractive to stretch a cable across the space. REL provides the ultimate solution with Airship Direct™, REL’s optional wireless system that conveys wide-bandwidth, compound signals, transmitting both High Level and .1/LFE together. Even with the scale and capacity of S/550, Airship Direct™ preserves the speed, clarity, and authority that define REL. It enables seamless transitions between audio and video without ever adjusting the controls, all from a single unit that connects neatly into the rear panel and remains invisible in your environment. Simple, direct, uncompromised: Airship Direct™.

This makes system setup cleaner and more stylish. Wireless freedom ensures a more elegant and flexible listening experience.