{"product_id":"rel-s550-10-active-subwoofer","title":"REL S\/550 10\" Active Subwoofer","description":"\u003cdiv class=\"align-items-center mt-3 pt-1 pt-md-0\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCompact Power, Engineered for Precision and Control\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eS\/550 delivers the speed, scale, and authority of Serie S in a more compact form. Powered by a 550-watt Pure Class D amplifier and advanced CarbonAlloy™ drivers, it brings refined dynamics and musical nuance to medium-sized rooms. Equally capable in high-end music systems or immersive theaters, S\/550 proves that true performance is defined by control not size.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"mt-3 pt-1 pt-lg-0 mb-0 key-features-list\"\u003e\n\u003cli\u003e550-watt Pure Class D Amplifier for fast, articulate bass performance\u003c\/li\u003e\n\u003cli\u003e10\" CarbonAlloy Active Driver with 12\" down-firing Passive Radiator for depth and speed\u003c\/li\u003e\n\u003cli\u003eOptimized for music and theater systems in medium-sized rooms\u003c\/li\u003e\n\u003cli\u003eDesigned for stereo pairs and line-array configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eDesigned for Excellence\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eTake in the design as a whole: horizontal strakes carved into the side walls, elegant elliptical returns that cradle handles finished in a warm golden-silver, echoing raw titanium. Everywhere you look, thoughtful details emerge—but the purpose is clear. This generation delivers the seemingly impossible: a larger cabinet that is lower, wider, and deeper, yet visually lighter.\u003c\/p\u003e\n\u003cp\u003eThe added internal volume gives drivers greater freedom and amplifiers improved efficiency, while updated internal bracing keeps cabinet resonances firmly under control. Subtler touches also make a difference, badges that disappear into the grille cloth, silver accents that rest quietly within the cabinet plane, and model numbers etched discreetly into the front rails, visible only when stacked in a Line Array.\u003c\/p\u003e\n\u003cp\u003eAn optional Premium Wood Grille adds warmth and individuality, while front-rail leveling adjusters ensure effortless setup, even on uneven floors. Together, these refinements reflect REL’s philosophy that great design is as much about thoughtful usability as it is about beauty and performance.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eDrive Faster. Drive Better\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eIn 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.\u003c\/p\u003e\n\u003ch4\u003ePassive Radiator\u003c\/h4\u003e\n\u003cp\u003eSupporting the active driver is an updated and redesigned down-firing passive radiator, purpose-built to handle the extreme throw distances created by the S\/550’s upgraded amplifier and driver. Its flat, primary-piston surface, an evolution of carbon, glass fibre, and closed-cell foam construction—is now 40% stiffer and significantly lighter than before. With more than 2.4\" (60mm) of travel in each direction, the passive extends dynamics, authority, and depth, completing a system that pushes well beyond expectations for its class.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eAmplified Excellence\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eRated at 550-watts, the Pure Class D amplifier outpaces its predecessor – but numbers tell only part of the story. In our 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 our Reference models, were installed in our  input filters resulting in a more open soundstage with greater transparency. We know from extensive experience that this unit is a rugged and reliable amplifier. As always, fed by our second generation PerfectFilter™, the deep bass is utterly remarkable for a subwoofer whose footprint is so tidy.\u003c\/p\u003e\n\u003ch4\u003eAnalog Filtered to Perfection\u003c\/h4\u003e\n\u003cp\u003eWe choose 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 our 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.\u003c\/p\u003e\n\u003cp\u003eFor systems where High Level isn’t possible, our 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.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eSerie S Line Array\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eREL’s Line Arrays are revered for producing sound staging and dynamics that rival the world’s finest systems. Designed to grow in pairs, a Line Array can begin with a simple stereo pair, expand with a second, and ultimately rise to three units per channel, delivering floor-to-ceiling authority and scale. \u003c\/p\u003e\n\u003cp\u003eS\/550 now features a precision-milled knurled aluminum adjustment knob integrated into the body rails. This knob allows the bottom subwoofer in a Line Array to achieve perfect level on uneven or soft flooring such as thick-pile carpets or dual-pad installations ensuring a safer, more stable foundation. Purpose-built exclusively for Line Array use, these adjustment knobs enable ideal setup and secure performance without compromise.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eWired For Sound…Wirelessly\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eSometimes 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™, our 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™.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"552\" style=\"border-collapse: collapse; width: 414pt;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol width=\"196\" style=\"mso-width-source: userset; mso-width-alt: 6842; width: 147pt;\"\u003e \u003ccol width=\"356\" style=\"mso-width-source: userset; mso-width-alt: 12427; width: 267pt;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eType\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eFront-firing active driver, down-firing passive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"39\" style=\"height: 29.0pt;\"\u003e\n\u003ctd height=\"39\" class=\"xl65\" width=\"196\" style=\"height: 29.0pt; width: 147pt;\"\u003eActive Driver Size \u0026amp; Material\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e10 in. (250mm) long-throw, CarbonAlloy™ cone structure, die cast alloy chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"39\" style=\"height: 29.0pt;\"\u003e\n\u003ctd height=\"39\" class=\"xl65\" width=\"196\" style=\"height: 29.0pt; width: 147pt;\"\u003ePassive Radiator Size \u0026amp; Material\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e12 in. (305mm), Carbon\/Carbon flat cone structure, steel chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eLow Frequency Extension\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e-6dB at 19Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"39\" style=\"height: 29.0pt;\"\u003e\n\u003ctd height=\"39\" class=\"xl65\" width=\"196\" style=\"height: 29.0pt; width: 147pt;\"\u003eInput Connectors\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eHigh Level Neutrik Speakon, Low Level (2) RCA, (1) LFE RCA, (1) LFE XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"39\" style=\"height: 29.0pt;\"\u003e\n\u003ctd height=\"39\" class=\"xl65\" width=\"196\" style=\"height: 29.0pt; width: 147pt;\"\u003eOutput Connectors\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eHigh Level Neutrik Speakon, (1) Low Level RCA, (1) LFE RCA or (1) LFE XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003ePower Output\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e550 watts (RMS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eAmplifier Type\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eLinear Class D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eWireless Capability\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eREL AirShip Direct (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eDual Parametric Filter\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eFinish\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003ePiano Black Lacquer, Gloss White Lacquer 8 coats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eFully Electronic Set Safe\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eD.C. Fault\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eOutput Short\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eMains Input Voltage\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e220-240 volts, 110-120 volts for certain markets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"39\" style=\"height: 29.0pt;\"\u003e\n\u003ctd height=\"39\" class=\"xl65\" width=\"196\" style=\"height: 29.0pt; width: 147pt;\"\u003eFuses\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003e8 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eMains Lead\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eNeutrik Speakon\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes (10 Meters Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.5pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"196\" style=\"height: 14.5pt; width: 147pt;\"\u003eUser Manual\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"356\" style=\"width: 267pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"The Music Room","offers":[{"title":"Piano Black","offer_id":51896480399641,"sku":"3472newREL-0001","price":3299.0,"currency_code":"USD","in_stock":true},{"title":"Piano White","offer_id":51896480432409,"sku":"3472newREL-0002","price":3299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/REL_S550_10inch_Powered_Subwoofer_1_9ada9ac2-6595-4f83-a826-1242a2f48005.jpg?v=1770701092","url":"https:\/\/tmraudio.com\/products\/rel-s550-10-active-subwoofer","provider":"The Music Room","version":"1.0","type":"link"}