The REL 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. REL S550 Features: 550-watt Pure Class D Amplifier for fast, articulate bass performance 10" CarbonAlloy Active Driver with 12" down-firing Passive Radiator for depth and speed Optimized for music and theater systems in medium-sized rooms Designed for stereo pairs and line-array configurations What's in the box Serie S/550 Subwoofer Power Cord 32' Neutrik Speakon cable Cloth Grille Line Array Mounting Hardware User Manual and Warranty Information *The Premium Wood Grille is NOT included in your subwoofer purchase but is available for purchase Technical Specifications 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 -6 dB 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 Linear Class D Wireless Capability REL AirShip Direct (sold separately) Dual Parametric Filter N/A Finish Piano Black Lacquer, Gloss White Lacquer 8 coats Protection System Fully Electronic Set SafeYes D.C. FaultYes Output ShortYes Mains Input Voltage220-240 volts, 110-120 volts for certain markets Fuses8 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation Supplied Accessories Mains Lead Yes Neutrik Speakon Yes (10 Meters Nominal) Interconnect – User Manual Yes
