REL Acoustics | SKU: NEW-RLS550-PIABLK

REL Acoustics S/550 10 Inch Powered Subwoofer - Piano Black

The REL S/550 powered subwoofer delivers fast, deep, and musical bass with a 12” carbon fiber driver, 550W Class A/B amplifier, and dual passive radiator design—ideal for high-end stereo and home theater systems.

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$3,299.00

Finish

Gloss White Gloss Black

Condition

New Demo

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What You Need to Know

The REL S/550 is the gateway to the legendary Serie S—a subwoofer built for full-range loudspeakers and reference systems that demand effortless low-end support without sacrificing agility or tone. Its 10-inch CarbonAlloy active driver, capped with pure carbon fiber in a die-cast alloy chassis, sharpens attack and smooths decay, while a 12-inch carbon/carbon down-firing passive radiator extends response to a subterranean 19Hz with no port noise or bloat. A 550-watt RMS Linear Class D amplifier keeps it composed, tight, and perfectly timed—whether tracking a cello's low register or the thunder of an action scene.

Integration is the REL signature: the 100%-analog High-Level Speakon input (32-foot cable included) feeds the sub the same signal as your main speakers, with premium polypropylene input-filter capacitors borrowed from REL's Reference designs. Low-level RCA plus LFE on both RCA and XLR cover theater processors, and matching outputs support stereo pairs and stackable Line Array configurations—mounting hardware is in the box. Finished in eight coats of Piano Black or Gloss White lacquer.

Features & Specifications

10" CarbonAlloy Driver — Carbon-fiber-capped cone for startling transient speed and low coloration.

12" Down-Firing Passive Radiator — Carbon/carbon construction extends depth to 19Hz without port artifacts.

550W RMS Linear Class D — Power-amp-grade reserves that stay composed under any demand.

High-Level Speakon Input — REL's signature connection with 32-foot cable included; Reference-grade analog filters.

Line Array Ready — Stackable design with mounting hardware included for reference-level systems.

Specifications

Type: Front-Firing Active Driver with Down-Firing Passive Radiator (Serie S)
Active Driver: 10" (250mm) Long-Throw CarbonAlloy Cone, Die-Cast Alloy Chassis
Passive Radiator: 12" (305mm) Carbon/Carbon Flat Cone
Low-Frequency Extension: -6dB at 19Hz
Amplifier: 550 Watts RMS, Linear Class D
Inputs: High-Level Neutrik Speakon, Low-Level (2) RCA, LFE RCA, LFE XLR
Outputs: High-Level Speakon, Low-Level RCA, LFE RCA or XLR (for pairs and arrays)
Wireless: REL AirShip Direct Compatible (sold separately)
Included: 32' Neutrik Speakon Cable, Cloth Grille, Line Array Mounting Hardware
Dimensions: 17.5"W x 14.75"H x 19.75"D
Weight: 68 lbs
Finish: Piano Black Lacquer or Gloss White Lacquer (8 coats)
Warranty: 3 Years Parts & Labor
Sold By: Each

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