Rel Acoustic 212/SX
The REL 212/SX is a premium dual‑12″ sealed subwoofer from REL’s Serie S, designed for high-end stereo and home theater use. It combines four 12″ drivers—two active front, one rear passive, and one down‑firing passive—with a potent NextGen 5 Class D 1,000 W RMS amplifier for deep, controlled bass down to 18 Hz (‑6 dB in-room)
Rel Acoustic 212/SX - 12" Inch 2-Channel Home Audio Subwoofer
- Musical & Cinematic: Smooth blend with stereo systems and blockbuster home theaters. Responds rapidly, adding height and width to soundstage
- Transformational Impact: Reviewers report enhanced spatial depth, bass definition, and overall system cohesion
- Setup Guidance: Supplied Speakon cable and manual guide users toward proper placement and tuning, including corner placement and high-level integration
- Massive yet refined bass output with impressive low-frequency reach
- Seamless integration with speakers via high-level input
- Elegant, luxurious build quality and finish
- Multiple connectivity modes including wireless option
(2) Front-firing active drivers, (1) rear passive, (1) down-firing passive
(2) 12 in., 300mm long-throw, Continuous CastAlloy™ cone structure, cast chassis
(2) 12 in., 300mm Carbon/Carbon flat cone structure, steel chassis
-6dB at 18 Hz
High Level Neutrik Speakon, Low Level stereo RCA, LFE XLR and LFE RCA
High Level Neutrik Speakon, LFE RCA, LFE XLR
1000 Watts (RMS)
NextGen3 Class D
Yes- REL AirShip system [required]. Sold separately.
Yes
Yes
Yes
220-240 volts, 1120-120 volts for certain markets
7 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation
14 1/4in., x 33in., x 20 1/4 in., (362 x 838 x 514.5mm)
58Kg
Yes
Yes (10 Meters Nominal)
N/A
Yes
Double Down
Twin Continuous Cast™ Alloy Bass Engines
Lightweight carbon fiber blades firmly attached to the rear of each active alloy cone serves to both strengthen the cone and quiet it. The twin 12” (300mm) active drivers now offer an additional 12mm of stroke and also benefit from updated suspension geometry and greater power handling. And a brand-new double-spider, high powered passive unit on the bottom delivers floor rippling low bass. The result is a major step forward in the 212 design, an already brilliant performer now playing louder with greater ease whilst better preserving the tiniest details of air and space with even greater precision.
Sound Beyond Its Size
Dual Continuous Carbon Passive Radiators
Our uniquely tuned passive radiators use special suspensions, now with an additional 30mm of linear travel, to produce performance far beyond conventional subwoofers. Our new SuperProgressive™ passive radiator produces extremely long travel allowing for very loud output while retaining the variable stiffness of its suspension.
The down firing passive produces deep, floor-crawling bass that makes a room shudder. Mounted above the amplifier panel on the rear is the second passive. This unit produces wrap around “atmospheric” bass that adds air and shimmer to the sound. Coupling with either the rear wall or the rear corner of a room allows for bass to develop exceedingly long wavefronts and adds an ease and effortless quality unique to single-box designs.
NextGen 5 1,000w Digital Amplifier
Whoever said “Power Corrupts” Never Heard a 212/SX
With incredible reliability in units now numbering in the thousands, the NextGen 5 Class D amplifier is a paragon of extreme power and reliability. At 1,000 watts of output, plus the ability to connect both High Level and .1/LFE simultaneously with optional state of the art wireless, 212/SX delivers the goods at scale. It does so with incredible grip and control in the extreme deep bass where most amplifiers get loose and lose control.
212/SX has an almost limitless sense of power, coupled with precision. Where others offer brute strength, we deliver massive power and every secondary category of performance with ease and effortless versatility. Deafening output in a concert video or blockbuster movie? Check. Beautifully rendered female vocals accurately placed within a stone abbey? Check
Futureproof Wireless
Airship Zero-Compression Wireless
We seized the opportunity to develop a new high resolution, audiophile-grade uncompressed wireless system for 212/SX and our newer offerings in the Reference range. Airship™ is a new 5.8 gHz military-based wireless system built into a monolithic LSI chip that delivers incredibly fast bass. We ship full bandwidth, not just bass, through this system that includes (2) channels. The first channel handles our High Level Input and can be used for both stereo bass or use of a single channel with monoblock amplifiers. Simultaneously, Airship will process the .1/LFE channel necessary for special effects in film so both RCA and XLR inputs are provided. In the future, we anticipate adoption of more active wireless loudspeakers reaching the market, so we included stereo low level inputs. With Airship, you’re ready for the future.
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