REL S/550 Subwoofer

REL S/550 Subwoofer

Coming Early October

All New REL Serie S Sound Reimagined

The new Serie S is a complete reinvention of one of our most iconic lines. Cabinets are wider and lower for greater presence. Drivers have been re-engineered for speed, control, and deeper reach. Amplifiers draw vast reserves of power from REL's Reference range, delivering authority with effortless ease. 

The result is bass that digs deeper, starts and stops faster, and integrates more seamlessly than ever before. Serie S offers not just output, but nuance, scale, and performance that transform both music and home theatre.

Serie S/550 

A Massive Step Forward

S/550 is the gateway to the Serie S line, delivering the speed, depth, and nuance that define REL’s performance ethos. While its larger sibling, the S/850, sets the ultimate benchmark, the S/550 carries forward many of the same design innovations, ensuring the essence of Serie S is fully realized in a more compact form.

The results are remarkable: S/550 offers lightning-fast transients, deep articulate bass, and tonal balance that breathes life into both music and film. Its ability to combine authority with refinement makes it an ideal choice for those seeking a true high-end experience in medium-sized systems, with performance that consistently exceeds expectations.

For those seeking a more bespoke finish, S/550 is available with an optional Premium Wood Grille upgrade for added warmth and individuality.

Drive Faster. Drive Better

The new S/550 10” high-amplitude driver has been completely rebuilt, only the cast frame remains. Its CarbonAlloy™ cone, capped with pure carbon fibre, sharpens attack and smooths decay, letting notes fade naturally into silence. A redesigned suspension allows greater travel, easily handling the amplifier’s added power.

In listening, the driver feels supple and effortless, free from strain. Because it’s lighter, the amplifier works less, yet delivers more power, allowing the driver to move further and play louder than ever before. The result is nothing short of a revelation.

Amplified Excellence

Rated at 550-watts, the Pure Class D amplifier outpaces its predecessor, but numbers tell only part of the story. In the REL  lab, this unit delivers 600-watts continuous with no strain for extended periods of time, not simply for an instant. Its crest power is fully 50% more than its predecessor. It delivers the fast, truly deep bass Serie S is known for, performance that defies spec sheets.  Premium polypropylene capacitors, like those used in their Reference models, were installed in the  input filters resulting in a more open soundstage with greater transparency. REL know from extensive experience that this unit is a rugged and reliable amplifier. As always, fed by their second generation PerfectFilter™, the deep bass is utterly remarkable for a subwoofer whose footprint is so tidy.

Analogue Filtered to Perfection

REL choose analogue because it is the only way to achieve truly natural sound. All REL input filters are 100% analogue, among the fastest ever offered in a subwoofer. At the core is their renowned High Level Input, which connects directly to the speaker outputs of your main amplifier. This doesn’t draw power; instead, it carries the full sonic signature of your system, allowing REL to blend seamlessly with your speakers, a quality reviewers have praised for decades.

For systems where High Level isn’t possible, our low-level input uses the same analogue filter circuit, available via both RCA and XLR connections, to deliver the speed, naturalness, and integration REL is known for. And in theatre or dual-use systems, REL uniquely allows High Level and .1/LFE to run together, so music benefits from natural integration, while movies deliver the full impact intended by the mix.

Wired For Sound…Wirelessly

Sometimes the best wire is no wire. Quality cables are a given in high-end audio systems, but there are occasions where it is impractical, unsafe, or unsightly to drape a cable across the room. REL delivers the ultimate solution with Airship Direct™, their optional wireless system that transmits wide-bandwidth, compound signals, carrying both High Level and .1/LFE simultaneously. Even with the scale and output of S/550, Airship Direct™ preserves the speed, transparency, and authority that define REL. It allows seamless transitions between music and movies without ever touching the controls, all from a single module that plugs neatly into the rear panel and stays invisible in your room. Simple, direct, uncompromised: Airship Direct™.

Serie S Line Array

REL Line Arrays are celebrated for their sound staging and dynamics, performance admired across the high-end audio community. Like all REL Line Arrays, they’re designed to grow with the listener: start with a stereo pair, expand to four, and ultimately build a full six-unit stack for floor-to-ceiling authority. Precision mechanical couplers lock each upper unit securely to the anchor REL below, ensuring stability and seamless integration.

The S/550 is the ideal entry into this world, delivering the speed, nuance, and scale that define Line Array performance. It offers a scalable foundation for music and home theatre enthusiasts looking to experience the benefits of REL’s vertical bass architecture in medium-sized rooms. As systems expand, the S/550 reveals even greater depth and dimensionality, vocals gain presence, instruments bloom with lifelike realism, and cinematic effects strike with powerful impact. A state-of-the-art experience made accessible, with the ability to grow over time.

NOTE: The REL Serie S/550 is supplied with a traditional cloth grill but a fetching Wooden slat grill is available as an optional extra (see drop down when ordering).