REL 212SE Hi-Fi Reference subwoofer 4x 12" 1000w 9Hz - twin stackable

REL 14 SW 212
NZ$ 7,495.00 ea (incl. GST)

Do One Thing - Do It Perfectly


Introducing 212/SE, our most powerful and agile subwoofer, designed exclusively for larger system and rooms to allow superior state of the art speakers to spring to full voice. We believe in quality first, not simply power and boom

We believe in quality first, not simply power and boom. We believe that 1,000 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.

To produce our highest output single-box solution, we doubled up on the Continuous CastTM Alloy Bass Engines that bring critical acclaim to Serie S, altering them slightly for this twin front-firing configuration. These twin actives are responsible for 212/SE’s incredible speed and tactility.

Our Continuous CastTM Alloy Cones reduce moving mass while maintaining rigidity, producing far more speed and precision than prior designs. These twin long-stroke 12″ bass engines, partnered with (2) matching 12″ passives provide the speed quality of a REL with a power never felt before. This combination offers the driven surface area of twin 17” drivers in a cabinet just 16” wide.

Sound Beyond Its Size

The 212/SE uses two matching Continuous Cast Alloy passives that are stiff, lightweight and incredibly well behaved. Our approach to passive design results in performance more akin to a variable ratio driver size – as more power and deeper bass is demanded, the passive comes to life, gradually expanding the capabilities of the active engines.

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.

Command and Control

Beyond our proprietary drivers, the performance of a REL is determined by our unique input filters and amplifiers. 212/SE harnesses a simple filter-type that is very fast—about 8 milliseconds in group delay– to cross out unwanted higher frequencies to our driver. This speed and gentle crossover slopes allow for seamless blending of RELs with the main speakers. RELs do not include a high pass filter to cross out bass from the main speaker because to do so would generally produce more unwanted effects than the minor benefits such a design confers.

212/SE’s power amplifier is a powerful NextGen3 1,000W (1,700 peak) digital amplifier. Our Herculean design allows each driver to output over 110 dB with ease–power enough to drive very large rooms to very high output.

Total Freedom

LongBow permits very fast, uncompressed bass to be sent wirelessly within the same room approximately 45 feet (somewhat dependent upon room clutter). We have selected an uncompressed format as it results in natural, quick delivery compared with conventional wi-fi or Bluetooth systems. LongBow also offers both high level (or low level with crossover intact) AND .1 channel delivery so that REL Theatre Reference performance can be maintained even when using our wireless delivery system.




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 Continuous CastAlloy™ cone structure, cast chassis
INPUT CONNECTORS - High Level Neutrik Speakon, Low Level stero RCA, LFE RCA, SMA for wireless antenna
POWER OUTPUT - 1,000 watts (RMS)
WIRELESS CAPABILITY - Longbow (Optional), Zero Compression, Individual discrete D/A and A/D Encoders 

Protection System
D.C. FAULT - 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

Dimensions - W X H X D  444.5 x 815.5 x 507 mm
NET WEIGHT - 55.3 kg
FINISH - Piano Black Lacquer, 8 coats

Supplied Accessories 
NEUTRIK SPEAKON - Yes (10 Meters Nominal)

In the interest of product development, REL Acoustics Limited reserve the right to vary these specifications without notice.


212/SE Inside and Out - The Making of The Product Of The Year

As REL’s John Hunter will tell you, you need a pair of 212SEs to disappear in your room, and that is the ultimate goal of a sub-bass system, to prove a transparent extension to your main speakers, never drawing attention to themselves. While the uninitiated might opt for small cubes that can be placed a bit more out of the way, Hunter explains it succinctly: “When you hear low-frequency information out in the real world, it doesn’t just come at you from off in the corner, it envelops you from all directions.” Thus, the height factor of the 212SE is equally important to disappear audibly.

As I write this the 212/SE just earned Product of the Year from Tone Audio, North America’s most respected pure high end audio webzine. With critical acclaim since its launch and a truly unique and stunning design, we thought we would share our design process on this (beautiful) beast since it is something of a departure for us.

Simply put, the 212/SE was the most –– most drivers, most power and highest output we could pull together into one small-footprint design. For many, this will be as far as their REL journey takes them, meeting or exceeding their expectations for output, speed and slam from an attractively styled and beautifully finished device. That fact we have 2 designs higher up the REL tree and that these are purpose designed to be used in Reference Line Arrays of 3+ per side, speaks to our never ending pursuit for truly perfect sound and desire to improve any system, even the largest most high-end systems, not any shortcomings of the 212/SE.

Our development work on a design never stops, even once we’ve signed off and gone into production. With the driver used in our S/5 SHO which used a new continuous casting process 12”/300mm alloy cone with cast thermoplastic voice coil locator to produce speed and weight reduction, we knew there was more to be explored. Specifically, increasing the number of drivers and bass alignment to determine a new sort of optimal price-to-performance ratio.

We had our joinery build up an experimental cabinet with multiple driver openings, driver blanking plates and a small acrylic panel where the amp would normally go using just a Speak-on connector so we could outboard the amp and test many different driver/passive location combinations. It had upper and lower rear driver cutouts to see if the location of drivers or passives had an effect (it did). Justin, our Lead Engineer, and I experimented with a number of combos including rear-mounted passive drivers located low, no passive on the bottom, active rear, 2 active forward firing only, etc. After a few months of experimentation, we arrived at the final orientation with (2) forward-firing active drivers, an upper rear-mounted passive and a down-firing passive—this combination gave the most natural sound, producing effortless bass with the ability to convey a hall’s large air volumes when that quality was captured in the recording.

In this regard, the 212/SE hinted at the spatial volumes—if not the speed, precision and attack– of one of our Reference Line Arrays. Part of the credit for this is the huge current reserves present in our new 1,000-watt amp platform. And when we say 1,000 watts, these are real, certifiable watts, not what we too often see from amps claiming this sort of horsepower (“Hey, the needle on the meter briefly touched that rating in the instant just before the amp demolished itself.”). Certification of this took over 5 months because this combination of ultra-high power and zero compression wireless ability had never been attempted before. In the end, persistence paid off and the testing lab came back with a clean bill of health.

212/SE’s ability to play enormously loud and carve out realistically huge volumes of space, consistent with being present at a live venue, makes the 212/SE a best buy. For much less than twice the price of an S/5, it produces far more than double the usable spatial volumes and is capable of underpinning epic home theatre installations or high end 2-channel systems due to its speed and delicacy—more than one reviewer has been pleasantly surprised to discover it can whisper as well as bite. Most of them are now sold as mono block subs—one per channel in stereo pairings, or multiples in grand theatre venues.

We hope this helps explain why 212/SE was granted not just subwoofer of the year, something it has been awarded twice already elsewhere, but overall PRODUCT of the year. Nothing else, no preamp, power amp, speakers, cables or acoustic/power accessories attained this for . And it all began because we knew there was more to be had, more and better that we could deliver to our customers. It is this relentless pursuit that we bring to the mix  which makes us different. Better. And now Product of the Year.