S550 Subwoofer

Serie S/550 - A Massive Step Forward

The first thing you notice is the design: lower, wider, and undeniably more seductive. At its heart is a 550-watt Pure Class D™ amplifier driving a re-engineered 10" CarbonAlloy™ active driver, paired with a lightning-fast 12" Carbon/Carbon passive radiator redesigned for 50 percent greater travel. Together they deliver effortless power, speed, and authority. The result is louder, faster, richer, and better. The S/550 delivers more of everything that matters, with speed and authority that belie its scale.

* Optional premium wood grille available.

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 fiber, 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 REL's 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 REL's Reference models, were installed in REL's input filters resulting in a more open soundstage with greater transparency. REL knows from extensive experience that this unit is a rugged and reliable amplifier. As always, fed by REL's second generation PerfectFilter™, the deep bass is utterly remarkable for a subwoofer whose footprint is so tidy.

Analog Filtered to Perfection
REL chose analog because it is the only way to achieve truly natural sound. All REL input filters are 100% analog—among the fastest ever offered in a subwoofer. At the core is REL's  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, REL's low-level input uses the same analog filter circuit, available via both RCA and XLR connections, to deliver the speed, naturalness, and integration REL is known for. And in theater 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.

• 550-watt Pure Class D Amplifier
• 10" CarbonAlloy™ Active Driver with 12" Down-Firing Passive Radiator
• Music & Theater Systems, Medium Rooms
• Stereo Pairs & Line Arrays
• Optional Premium Wood Grille Available

• TYPE:  Front-firing active driver, down-firing passive
• ACTIVE DRIVER SIZE & MATERIAL:  10 in. (250mm) long-throw, CarbonAlloy™ cone structure, die cast alloy chassis
• PASSIVE RADIATOR SIZE & MATERIAL:  12 in. (305mm), Carbon/Carbon flat cone structure, steel chassis
• LOW FREQUENCY EXTENSION:  -6dB at 19Hz
• INPUT CONNECTORS:  High Level Neutrik Speakon, Low Level (2) RCA, (1) LFE RCA, (1) LFE XLR
• OUTPUT CONNECTORS:  High Level Neutrik Speakon, (1) Low Level RCA, (1) LFE RCA or (1) LFE XLR
• POWER OUTPUT:  550 watts (RMS)
• AMPLIFIER TYPE:  Pure Class D
• WIRELESS CAPABILITY:  REL AirShip Direct (sold separately)

DIMENSIONS

• W x H x D:  17.5 x 14.75 x 19.75 in (445 x 372 x 500 mm)
• NET WEIGHT:  68 lbs. (31 kg)
• FINISH:  Piano Black Lacquer, Gloss White Lacquer 8 coats
• LINE ARRAY CAPABLE (Y/N):  Y