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Category: Subwoofer

REL 212/SX - 2x 12 Inches Active Subwoofer

Key Features

  • Dual 12-Inch Active Driver Design
    Features two high-excursion 12-inch active drivers that deliver powerful, fast, and authoritative bass performance.

  • Sealed and Passive Radiator System
    Uses active drivers with dual passive radiators to extend low-frequency depth while maintaining tight control and musical accuracy.

  • High-Power Class-D Amplification
    Equipped with a high-current amplifier delivering massive output and dynamic headroom for demanding music and home theatre systems.

  • Deep Low-Frequency Extension
    Capable of reproducing extremely low bass frequencies for immersive cinematic impact and realistic musical reproduction.

  • High-Level and Low-Level Inputs
    Includes high-level Speakon, stereo RCA, LFE RCA, and balanced XLR connections for seamless system integration.

  • Optional Wireless Compatibility
    Supports REL wireless technology for flexible, cable-free placement when used with the optional transmitter.

  • Advanced Electronic Protection
    Built-in protection systems ensure safe, stable, and reliable long-term operation.

  • Rigid, Low-Resonance Cabinet
    Heavily constructed enclosure minimizes vibration and distortion for cleaner, more controlled bass output.

  • Premium Finish and Build Quality
    High-quality cabinet finish designed to complement reference-level audio systems.

  • Ideal for Large Rooms and Reference Systems
    Engineered to deliver both musical precision and cinematic power in high-end listening environments.

Description

212/SX

212/SX builds on the strengths of the legendary 212/SE. Upgraded alloy drivers with carbon fibre blades are stronger, a new flat passive radiator extends even deeper, and our PerfectFilter™ delivers crushing low bass with greater speed and air, taking 212/SX well beyond its illustrious predecessor.

The Powerful 212/SX

QUALITY MEETS QUANTITY

At REL, a deeper understanding of quality underpins everything we do. So, whilst 212/SX thunders and shakes foundations, it also resolves detail and restores midrange warmth to its correct balance. At 1,000 watts with (4) 12” (350mm) drivers, 212/SX drives rooms hard and in multiple modes, which allows it to create richer bass everywhere in a room.

Refinements to both our legendary ultra-fast filters and newly developed drivers producea harder slam and bring to life quieter, gentler moments, improving system performance at both extremes. Plays brilliantly with both high-end 2-channel and large power theatre applications.

Double Down

TWIN CONTINUOUS CAST™ ALLOY BASS ENGINES

Lightweight carbon fibre blades firmly attached to the rear of each active alloy cone serve to both strengthen the cone and quiet it. The twin 12” (350mm) 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-ripping 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.

NextGen5 1,000w Digital Amplifier

WHOEVER SAID “POWER CORRUPTS” NEVER HEARD A 212/SX

With incredible reliability in units now numbering in the thousands, the Gen 5 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 speedy 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 the 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 the adoption of more active wireless loudspeakers reaching the market, so we included stereo low-level inputs. With Airship, you’re ready for the future.

 

 Specifications

TYPE
(2) Front-firing active drivers, (1) rear passive, (1) down-firing passive
ACTIVE DRIVER SIZE & MATERIAL
(2) 12 in., 300mm long-throw, Continuous CastAlloy™ cone structure, cast chassis
PASSIVE RADIATOR SIZE & MATERIAL
(2) 12 in., 300mm Carbon/Carbon flat cone structure, steel chassis
LOW FREQUENCY EXTENSION
-6dB at 18 Hz
INPUT CONNECTORS
High Level Neutrik Speakon, Low Level stereo RCA, LFE XLR and LFE RCA
OUTPUT CONNECTORS
High Level Neutrik Speakon, LFE RCA, LFE XLR
POWER OUTPUT
1,000 watts (RMS)
AMPLIFIER TYPE
NextGen5 Class D
WIRELESS CAPABILITY
Yes- REL AirShip system [required]. Sold separately.
FULLY ELECTRONIC SET SAFE
Yes
D.C. FAULT
Yes
OUTPUT SHORT
Yes
MAINS INPUT VOLTAGE
220-240 volts, 1120-120 volts for certain markets
FUSES
7 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation
W X H X D
14 1/4in., x 33in., x 20 1/4 in., (362 x 838 x 514.5mm)
NET WEIGHT
128 lbs. (58 kg)
MAINS LEAD
Yes
NEUTRIK SPEAKON
Yes (10 Meters Nominal)
INTERCONNECT
N/A
USERS MANUAL
Yes

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