{"product_id":"rel-s850-12-active-subwoofer","title":"REL S\/850 10\" Active Subwoofer","description":"\u003cdiv class=\"align-items-center mt-3 pt-1 pt-md-0\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb id=\"docs-internal-guid-4898bc15-7fff-fd5d-3250-42fa18d95627\"\u003e\u003cspan\u003eEffortless Power, Tuned for Musical Authority\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003eS\/850 is engineered for listeners who want uncompromising performance with a refined, musical touch. Drawing on innovations from our Reference line, it pairs an 850-watt Linear Class D amplifier with advanced CarbonAlloy™ drivers to deliver explosive dynamics, clarity, and effortless scale. Equally at home in high-end music systems or immersive theaters, S\/850 brings control and confidence to medium-to-large rooms.\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\u003e850-watt Linear Class D Amplifier for fast, controlled power delivery\u003c\/li\u003e\n\u003cli\u003e12\" CarbonAlloy™ Active Driver with 12\" long-stroke Passive Radiator for depth and speed\u003c\/li\u003e\n\u003cli\u003eOptimized for music and theater systems in medium-to-large rooms\u003c\/li\u003e\n\u003cli\u003eDesigned for stereo pairs and line-array configurations\u003c\/li\u003e\n\u003cli\u003eOptional premium wood grille available. Crafted from natural materials, each grille features unique grain and color variations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eDesigned to be Perfect\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eThe S\/850 cabinet is longer, lower, wider, and deeper—proportions that give it a naturally dynamic presence. Subtle design details refine its look and feel: clean creases that catch the light, warm silver-gold badges with a titanium-like finish, and stainless-steel handles recessed into graceful ellipses. Beneath each front rail, precision-milled billet cylinders provide exact leveling, while thick internal aluminum slabs secure the handles for safe stacking in Line Arrays. Designed to complement modern interiors, the S\/850 also offers an optional Premium Wood Grille, adding warmth and individuality.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eDriven to Perfection\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eThe S\/850 is the result of relentless refinement. This progress comes not only from exploring newer, finer materials, but also from the thousands of hours of critical listening our team undertakes each year—experience that transforms raw engineering into musical and theatrical performance of the highest order. With every detail carefully considered, the S\/850 delivers a level of power, nuance, and scale that redefines what’s possible in its class.\u003c\/p\u003e\n\u003cp\u003eS\/850 drivers now feature lightweight pure carbon-fiber center caps, replacing the solid aluminum moldings of earlier models. These caps reduce moving mass while stiffening the cone, resulting in explosive dynamics and the ability to resolve the quietest passages with delicacy and nuance. Feather-light yet rigid, they extend performance at both extremes—a hallmark of REL design.\u003c\/p\u003e\n\u003ch4\u003ePassive Radiator\u003c\/h4\u003e\n\u003cp\u003eSupporting this advanced active driver is a newly engineered down-firing passive radiator. Purpose-built to handle the extreme throw distances produced by the S\/850’s more powerful amplifier and driver system. Its flat, primary-piston surface—crafted from carbon, glass fibre, and light, stiff closed-cell foam, represents an evolution of prior designs but is now 40% stiffer and significantly lighter. With over 2.4\" (60mm) of travel in each direction, it expands dynamics and low-frequency authority, unlocking the full scale and impact of the S\/850.\u003c\/p\u003e\n\u003ch4 class=\"mb-3 h3\"\u003eMonoblock Slam, Class D Efficiency\u003c\/h4\u003e\n\u003cdiv class=\"text-content\"\u003e\n\u003cdiv class=\"metafield-rich_text_field\"\u003e\n\u003cp\u003eThe S\/850’s amplifier delivers the slam of massive Class A\/B monoblocks while harnessing the efficiency of a modern Class D output stage. Supported by a robust traditional power supply, it produces 850 watts of continuous output and can surge to 1,000 watts during demanding peaks, ensuring ample headroom for both music and theater. Upgraded input filters, equipped with the same thin-film capacitors used in our flagship designs, introduce a new level of transparency and refinement previously unheard of in this class. Together, these advancements create dramatic improvements in clarity, sound staging, and sheer authority—an amplifier that blends brute force with finesse to anchor the performance of the entire Serie S line.\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\/850 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\/850, 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;\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv dir=\"auto\"\u003e\n\u003cdiv dir=\"auto\"\u003e\n\u003cdiv tabindex=\"-1\"\u003eType\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\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;\"\u003e12 in. (305mm) 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;\"\u003e850 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":51895361372441,"sku":"3473newREL-0001","price":3999.0,"currency_code":"USD","in_stock":true},{"title":"Piano White","offer_id":51895361405209,"sku":"3473newREL-0002","price":3999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/REL_S850_12inch_Powered_Subwoofer_1.jpg?v=1769608984","url":"https:\/\/tmraudio.com\/products\/rel-s850-12-active-subwoofer","provider":"The Music Room","version":"1.0","type":"link"}