REL Serie S – 212/SX Subwoofer

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 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.

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.

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
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
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.

Details & Specifications

TYPE: Closed box, (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, die cast alloy chassis
PASSIVE RADIATOR SIZE & MATERIAL: Rear: 12 in. (300mm) Continuous CastAlloy™ cone structure, die cast alloy chassis; Down: 12 in. (300mm) Carbon/Carbon flat cone structure, steel chassis
LOW FREQUENCY EXTENSION: 18Hz at -6 dB
INPUT CONNECTORS: High Level Neutrik Speakon, Low Level (2) RCA, (1) LFE RCA, (1) LFE XLR
OUTPUT CONNECTORS: High Level Neutrik Speakon, (1) LFE RCA or (1) LFE XLR**
POWER OUTPUT: 1000 watts (RMS)
AMPLIFIER TYPE: NextGen 5 Class D
WIRELESS CAPABILITY: REL AirShip II (sold separately)
DUAL PARAMETRIC FILTER: No
FULLY ELECTRONIC SET SAFE: Yes
D.C. FAULT: Yes
OUTPUT SHORT: Yes
MAINS INPUT VOLTAGE: 220-240 volts, 110-120 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): 14 1/4in., x 33in., x 20 1/4 in., (362 x 838 x 514.5mm)
NET WEIGHT: 128 lbs. (58 kg)
SHIPPING WEIGHT: Unknown
FINISH: Piano Black Lacquer
SUPPLIED ACCESSORIES: Mains Lead, Neutrik Speakon (10 Meters Nominal), User Manual

IGNORE: Series S, Series-S, Serie-S, Series, 212SX, 212-SX, 212 SX, Rell, wrell, Sub