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REL 212 SX 1000W 4 x 12" Subwoofer Gloss Black

Call To Order

The 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 REL's PerfectFilter™ delivers crushing low bass with greater speed and air, taking 212/SX well beyond its illustrious predecessor.


The powerful 212/SX, where quality meets quantity

At REL, a deeper understanding of quality underpins everything the team 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 4x 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 the brand's legendary ultra-fast filters and newly developed drivers produces harder slam and brings to life quieter, gentler moments, improving system performance at both extremes. Plays brilliantly with both high end 2-channel and large power theatre applications.

Key Features:
- An evolution of the popular 212/SE subwoofer
- Total of 4 Drivers for a size-defying performance
- 2 x 12" long-throw Continuous CastAlloy active drivers
- Passive drivers located at the rear and underside of the unit
- 2 x 12" active drivers, 2 x 12" Passive Radiators
- New double-spider, 12" passive radiators with additional 30mm travel
- 1000W RMS Power from a NextGen5 Class D Amplifier
- High Level, Low Level, & LFE Inputs
- Incredibly flat response right down to 18Hz at -6dB
- Newly refined ultra-fast filters
- Wireless capability with optional 5.8 GHz AirShip transmitter

"This REL's performance is surprisingly nuanced – yet there is no lack of clout. Massive explosions: check. Stomach-churning LFE: check. Nosebleed-inducing deep notes so far above 100dB volume they will rip the mic out of your iPhone trying to measure it: check.
The 212/SX’s outrageously lairy looks are a contrast to its gloriously refined performance. This delivers precise, ultra-deep bass without bloat."
Read the full review here

Quality Meets Quantity

REL believe in quality first, not simply power and boom. 1000 watts is only desirable if it’s conveyed with speed and control. Which is why the 212/SE was engineered to not only make your heart pound and walls shake, but restore midrange warmth and harmonic structure while providing a powerful, rich low-end. This combination of speed, power and grace driving multiple room modes (forward, down and rear) makes it ideally suited for high-end 2-channel, grand rooms, and dedicated theaters, allowing larger state of the art speakers to spring to full voice.


Double Down - Twin Continuous Cast Alloy Bass Engines

Lightweight carbon fibre blades firmly attached to the rear of each active alloy cone serves 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 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 Cast Alloy Passive Radiators

REL's uniquely tuned passive radiators use special suspensions, now with an additional 30mm of linear travel, to produce performance far beyond conventional subwoofers. The brand's 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.


Whoever Said "Power Corrupts" Never Heard A 212/SX - NextGen5 1000W Digital Amplifier

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.


AirShip Zero-Compression Wireless - Futureproof Wireless

REL seized the opportunity to develop a new high resolution, audiophile-grade uncompressed wireless system for 212/SX and their 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. They ship full bandwidth, not just bass, through this system that includes (2) channels. The first channel handles the 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, REL anticipate the adoption of more active wireless loudspeakers reaching the market, so they included stereo low-level inputs. With Airship, you’re ready for the future

Learn more about the AirShip Wireless Transmitter here


Positioning Your REL Subwoofer

The correct placement of your REL can drastically enhance its performance and transform your listening experience. So, REL Acoustics created a guide to help you get the most out of your subwoofer and showcase how multiple subwoofers can be used to provide breathtaking 2-channel scores and truly theatre-quality 3D sound.

Use the REL Room Setup tool here

From the Serie S

Serie S combines a higher performance level than REL has ever set out to deliver within their mid-level range, able to elevate higher-end systems in medium to large rooms. When REL began designing Serie S, they set out, quite literally, to revolutionize subwoofers. They developed ultra-lightweight and extremely rigid Continuous Cast™ alloy cones for power and crisp clarity. They leveraged passive drivers to extend the scale beyond the cabinet size, and they developed zero-compression embedded wireless for freedom of placement and a clean visual aesthetic to match its sophisticated finishes.

REL encourages you to experience the sound and beauty of Serie S, it will change the way you hear music and experience theater.


REL Acoustics

"We make subwoofers. That’s it. Nothing else. No distractions. Nothing to steal our focus. No kidding ourselves that we can be good at everything. No trying to conquer the whole world. We just do our best to conquer our bit of it."

More Information
Model Number 212SX
RRP 8,499.00

Subwoofer Specs

Type: 2 x Front-firing active drivers, 1 x rear passive, 1 x down-firing passive

Active Driver Size & Material: 2 x 12", 300mm long-throw, Continuous CastAlloy™ cone structure, cast chassis
Passive radiator size & material: 2 x 12", 300mm Carbon/Carbon flat cone structure, steel chassis

Low-frequency extension: -6dB at 18Hz

Input Connectors: High-Level Neutrik Speakon, Low-Level stereo RCA, LFE XLR and LFE RCA

Power Output: 1000 watts (RMS)
Amplifier Type: NextGen5 Class D

Wireless Capabilities: REL AirShip system (Optional, sold separately)


Protection System

Fully Electronic Set Safe: Yes
D.C. Fault: Yes
Output Short: Yes
Mains Input Voltage: 220-240 volts
Fuses: 7 Amp 220 volts operation, 15 Amp semi delay, 120 volts operation



Dimensions (WxHxD): 362 x 838 x 515 mm
Net Weight: 58 kg
Finish: Piano Black Lacquer


Supplied Accessories
- Power Cable
- 10m Neutrik Speakon Cable
- User Manual

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3 Years
All REL sub-bass systems carry a three-year warranty covering full parts & labour.

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If you experience any issues with this product please don't hesitate to contact us.
How much does delivery cost?
We offer free post on all orders over $29 to anywhere within the Australian mainland and Tasmania.

Can I pick up my purchase from your store?
Yes. You can usually pick up your order from one of our stores. We recommend that you contact us first to ensure your order is ready for collection.

What happens if I'm not happy with my product when it arrives?
We offer a 30 day 100% satisfaction guarantee on all of our products! If your order arrives damaged, faulty or not quite as you expected, please contact us and we will do everything we can to fix the situation.

Please visit our FAQ page for answers to other frequently asked questions or contact us if you have any other questions or comments.