REL Acoustics Serie S 10-Inch Powered Subwoofer in Piano Black Lacquer (Each) - S/550 BLACK

REL Acoustics S/550 BLACK Serie S 10-Inch Powered Subwoofer in Piano Black Lacquer (Each)

The REL Acoustics S/550 BLACK Serie S powered subwoofer combines a built-in 550-watt RMS Class D amplifier, a 10 in front-firing CarbonAlloy active driver and a 12 in down-firing passive radiator, with in-room low-frequency extension of -6 dB at 19 Hz. Designed for two-channel music and home theater in medium-sized rooms of approximately 250-500 sq. ft., it supports simultaneous High Level and .1/LFE connections so both listening modes can share one bass system. Piano Black Lacquer gives this single-subwoofer configuration a polished finish, while second-generation PerfectFilter helps integrate its low bass with the main speakers.

Key Features

Piano Black Lacquer and Refined Cabinet Design

Shaped side-wall strakes, recessed badges and curved handle recesses give the cabinet a deliberate, restrained appearance in a visible listening space. Updated internal bracing is designed to limit cabinet resonance, so the construction serves the sound as well as the presentation. A cloth grille comes standard; an optional Premium Wood Grille offers another way to personalize the front.¹

10 in CarbonAlloy Active Driver

A die-cast alloy chassis supports a redesigned long-throw assembly with a lighter CarbonAlloy cone, a pure-carbon-fiber cap and revised suspension. These changes are intended to make musical attacks more immediate and decays more natural, while allowing greater travel as listening levels rise. The engineering focuses on preserving expression as well as delivering impact.

12 in Down-Firing Passive Radiator

The Carbon/Carbon flat-cone assembly contributes bass depth without adding a second powered driver. Its revised construction is 40% stiffer than the predecessor design, with more than 2.4 in of travel in each direction to preserve low-bass dynamics as the active driver moves more air. This downward-facing radiator complements the front-firing active driver rather than requiring another powered cone.

550 Watts RMS and Second-Generation PerfectFilter

Dedicated Class D amplification is designed to give bass transients the power and control needed for both musical subtlety and movie dynamics. Second-generation PerfectFilter supports low-frequency reach, while polypropylene capacitors in the all-analog input filters help preserve openness and transparency. Together, these refinements are intended to add scale without letting bass dominate the main speakers.

High Level and .1/LFE Without Switching

For stereo listening, the High Level input takes its signal from the main amplifier's speaker outputs, carrying that system's sonic character into the bass without drawing power from the amplifier. Keep High Level and .1/LFE connected simultaneously for a dual-purpose music and movie setup rather than changing between the two connection methods. High Level Neutrik Speakon, two RCA low-level inputs, and dedicated RCA or XLR LFE inputs provide wired options; a 32 ft Neutrik Speakon cable is included.

Stereo Pair and Line-Array Expansion

Start with this single subwoofer and add separately purchased units for a stereo pair or line arrays of up to three subwoofers per channel. Line-array mounting hardware is included, and front-rail adjustments with integrated knurled aluminum knobs help level the bottom unit on uneven or soft flooring. This expandable arrangement is designed to build scale and dynamics as the system grows.

Optional AirShip Direct Wireless

When a long signal-cable run would be visible or impractical, the separately sold AirShip Direct system offers a wireless connection option. It carries High Level and .1/LFE signals together, allowing music and movie use without readjusting the controls between them. The wireless accessory is not included, and the subwoofer still uses its supplied power cord.

Features

• Piano Black Lacquer
  Shaped side detailing and a braced cabinet pair a restrained appearance with construction designed to limit resonance.
• Cloth Grille Included
  Personalize the look with an optional, separately purchased Premium Wood Grille.¹
• 10 in CarbonAlloy Active Driver
  A carbon-fiber cap and redesigned suspension support responsive bass attack and decay.
• 12 in Carbon/Carbon Passive Radiator
  Supports in-room low-frequency extension to 19 Hz at -6 dB without a second powered driver.
• 550 Watts RMS Class D Amplification
  Drives music and movie bass with dedicated onboard amplification.
• Second-Generation PerfectFilter
  Analog input filtering with polypropylene capacitors supports transparent integration with the main speakers.
• High Level Neutrik Speakon Input
  Includes a 32 ft cable for a signal connection at the main amplifier's speaker outputs.
• Simultaneous High Level and .1/LFE
  Keeps stereo bass and dedicated movie-effects connections in use together.
• RCA and XLR Connections
  Two RCA low-level inputs plus RCA and XLR LFE inputs accommodate alternative wired connections.
• Stereo Pair and Line-Array Expansion
  Included mounting hardware supports arrays using separately purchased subwoofers, up to three per channel.
• Integrated Line-Array Leveling
  Knurled aluminum knobs adjust the bottom unit on uneven or soft floors.
• AirShip Direct Wireless-Ready
  The separately sold accessory preserves both stereo and effects-channel signal paths.
• Electronic Protection
  Fully Electronic Set Safe, DC-fault and output-short protection are built in.

Footnotes:

¹ Premium Wood Grille is not included and must be purchased separately. A cloth grille is supplied.