REL Acoustics S/550 Subwoofer
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Product Overview & Specifications
The REL Acoustics S/550 serves as the gateway to REL’s prestigious Serie S line, delivering speed, subterranean depth, and refined musicality in a compact chassis. Engineered with a front-firing 10-inch CarbonAlloy™ active driver and a down-firing 12-inch flat carbon passive radiator, the S/550 reaches down to an impressive -6 dB at 19 Hz. Its newly redesigned cabinet is lower, wider, and deeper to provide added internal volume while reducing visual mass, complete with carved side strakes and titanium-accented handles.
At the heart of the S/550 is a 550W RMS (600W continuous) Pure Class D amplifier, supported by premium polypropylene capacitors and REL’s second-generation PerfectFilter™. Featuring REL's iconic 100% analog High Level Neutrik Speakon input alongside simultaneous .1/LFE RCA and XLR connections, the S/550 seamlessly blends with main speakers for music while simultaneously handling cinematic low-frequency effects. Designed to grow alongside your system, the S/550 supports vertical REL Line Array stacking and optional zero-compression Airship Direct™ wireless connectivity.
KEY FEATURES & PROPRIETARY TECHNOLOGIES
- Reengineered 10-Inch CarbonAlloy™ Active Driver: Features a pure carbon fibre cap, cast alloy chassis, and extended suspension travel for rapid transient response and effortless output.
- Down-Firing 12-Inch Carbon Passive Radiator: Flat carbon/carbon passive cone enhances low-frequency efficiency and acoustic reinforcement in medium-sized spaces.
- 550W Pure Class D Amplifier Stage: Delivers 550 Watts RMS (600W continuous) with 50% more crest power than previous generations, fed by reference-grade polypropylene capacitors and PerfectFilter™ technology.
- 100% Analog High-Level & Simultaneous .1/LFE Inputs: High-Level Neutrik Speakon input taps directly into main amplifier speaker outputs to preserve system tonality, operating simultaneously with LFE for dual music/movie integration.
- Serie S Line Array Scalability: Mechanical coupling points enable vertical stacking into 2-, 4-, or 6-unit Line Arrays for floor-to-ceiling dynamic authority and soundstaging.
- Airship Direct™ Wireless Capability: Rear-panel support for REL’s optional wireless module, transmitting uncompressed wide-bandwidth High-Level and .1/LFE signals without cables.
SPECIFICATIONS
| Subwoofer Type | Front-Firing Active Driver with Down-Firing Passive Radiator |
| Active Driver | 10" (250 mm) Long-Throw CarbonAlloy™ Cone, Die-Cast Alloy Chassis |
| Passive Radiator | 12" (305 mm) Carbon/Carbon Flat Cone Structure, Steel Chassis |
| Lower Frequency Extension | -6 dB at 19 Hz |
| Amplifier Power Output | 550 Watts RMS (Linear Class D) |
| Input Connectors | High-Level Neutrik Speakon, Low-Level Stereo RCA, (1) LFE RCA, (1) LFE XLR |
| Output Connectors | High-Level Neutrik Speakon, Low-Level Stereo RCA, (1) LFE RCA or (1) LFE XLR |
| Filter Architecture | 100% Analog Pure Filter Network with PerfectFilter™ Technology |
| Wireless Compatibility | REL Airship Direct Receiver Support (Transmitter Sold Separately) |
| Line Array Compatibility | Stackable (Supports 2 to 6-unit Stereo/Mono Line Array Configurations) |
| Protection Systems | Fully Electronic Set Safe, D.C. Fault, Output Short Protection |
| Mains Input Voltage | 220–240 V (110–120 V for specific regional markets) |
| Dimensions (W x H x D) | 445 x 372 x 500 mm |
| Net Weight | 31 kg |
| Included Accessories | Mains Power Cable, Neutrik Speakon Cable (10 m Nominal), User Manual |
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REL Acoustics S/550 Subwoofer
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