REL Acoustics S/850 - Active Subwoofer

S/850 Effortless Power, Tuned for Musical Authority S/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. 850-watt Linear Class D Amplifier for fast, controlled power delivery 12" CarbonAlloy™ Active Driver with 12" long-stroke Passive Radiator for depth and speed Optimized for music and theater systems in medium-to-large rooms Designed for stereo pairs and line-array configurations Optional premium wood grille available. Crafted from natural materials, each grille features unique grain and color variations. Stunning Design Meets Raw Power S/850 stands as the benchmark of the Serie S line, with its design innovations shaping and elevating its three stablemates. Every improvement is sweeping and comprehensive, ensuring the entire Serie S family benefits from the advancements pioneered in the S/850. The results are spectacular: it delivers incredible attack and output beyond even the former Carbon Special at the very limits of performance, yet with the precision, quietness, and clarity that produce true dynamic range. Lightning-fast transients, deep effortless bass, and tonal richness combine to deliver nuance that elevates both music and theater. Designed to be Perfect The 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. What's in the box Serie S/850 Subwoofer 6' AC Power Cord 32' Neutrik Speakon cable Line Array Mounting Hardware Cloth Grille User Manual and Warranty Information *The Premium Wood Grille is NOT included in your subwoofer purchase but is available for purchase. SPECIFICATIONS Type Front-firing active driver, down-firing passive Active Driver Size & Material 12 in. (305mm) long-throw, CarbonAlloy™ cone structure, die cast alloy chassis Passiver Radiator Size & Material 12 in., (305mm), Carbon/Carbon flat cone structure, steel chassis Low Frequency Extention -6dB at 19 Hz Input Connectors High Level Neutrik Speakon, Low Level stereo RCA, LFE RCA, LFE XLR Output Connectors High Level Neutrik Speakon, LFE RCA, LFE XLR Power Output 850 Watts (RMS) Amplifier Type Linear Class D Wireless Capability Yes- REL AirShip system [required]. Sold separately. Fully Electronic Set Safe Yes D.C Fault Yes Output Short Yes Mains Input Voltage 220-240 volts, 110-120 volts for certain markets Fuses 8 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation Dimensions (W X H X D) 19.25 x 16.125 x 21.25 in., (488 x 410 x 540 mm) Weight 42.5 Kg Mains Lead Yes Neutrik Speakon Yes (10 Meters Nominal) Interconnect Yes Users Manual Yes