Carbon Limited

Carbon Ltd. Is a special offering that provides a unique blend of RELs Reference carbon fibre 12” driver and our finest passive driver from the 212/SE.


3 year warranty

Finance example

£559.80 initial 20% deposit then £124.40 per month for 18 months. Other finance terms available. Finance subject to status

Carbon Limited


Reference Sound, Smaller Size

REL wondered what might be accomplished if they shoehorned their Reference driver into a standard cabinet. Might they be able to deliver something special for systems where space was at a premium? To keep up with it, they would need their highest output passive driver and plenty of power to drive it all.

They began with their finest 12” driver, the ultra-longstroke G-1MKII carbon fibre driver, noted for its speed and purity. To keep up with its dynamics, they fitted the light alloy passive from our 212/SE driven by the 550 watt amplifier from the S/5 SHO, here with a few more joules of output. The heavyweight 30mm-thick cabinet, borrowed from the hugely successful S/5, is our most advanced standard cabinet, with hardwood bracing employed extensively throughout its interior to quiet unwanted vibration. Turning to the visual presentation, true triple chrome-plated hardware was used for the exclusive top badge and matching feet which reflect their surroundings, while polished stainless T-304 steel handles complete the ensemble. Carbon Ltd. embodies all of their modern capabilities in a single, compact form.

In the end, we have achieved something special, but only available in limited quantities because many of the processes needed to build Carbon Ltd. do not lend themselves to large scale production.

Lacquer, Carbon, Chrome & Enamel

The badge requires three months to produce a single run, they use 9 separate processes just to produce the perfect triple chrome plated finish. The feet appear almost liquid, reflecting both their surroundings and the owner’s taste exquisitely. Chrome plating over Old World die-stamped embossed logos, carefully back-filled using organic enamel; another age-old technique that harks back to a time of carriages and horses. Carbon Ltd. blends modern and antique artisan craftsmanship into a single, seductive whole.

Inspired by the G/1 mk II

A perfect 12” carbon fibre driver is a thing of genuine beauty, both physically and technically. Carbon fibre offers the ideal combination of ultra-light weight–a REL touchstone for over a decade–with a tough, resilient and extremely quiet cone structure that produces wickedly fast, sensationally deep low bass. To produce the high output levels our clients expect, they endowed this bass engine with a full 4” (100mm) of stroke, enough to supply the prodigious output appropriate for such a special model.

NextGen2 550W Digital Amplifier

REL amplifiers are expected to produce very fast, tightly controlled deep bass with explosive dynamics, and do so for years on end. The 550W NextGen2 amplifier offers standard setting reliability with many thousands of this high current amplifier having been produced over the past decade. And with industry-leading fast, musical input filters, transients so important to the full enjoyment of music and theatre arrive without dynamic compression or the sort of dull, heavy character many subwoofers are guilty of delivering.

Longbow™ Wireless Connectivity

Carbon Ltd. includes a state-of-the-art wireless Longbow receiver built into the filter board, seamlessly integrating modern wireless into a classic subwoofer design. All you need to do is purchase the Longbow Wireless transmitter. Zero compression means that musical and theatrical signals are beamed one-to-one, in a bit perfect manner without resorting to severe compression best suited to mobile telephones. Discrete D/A convertors and A/D encoders are used internally, along with separate analog and digital power supplies. It even comes out of standby flawlessly, as the main on-off standby circuit takes into account Longbow’s wireless signal and comes to life as intended.

Tech spec


Closed box, front-firing active woofer

Active Driver Size & Material

12 in., 300mm long-throw, carbon fibre cone with inverted carbon fibre centre cap

Passive Radiator Size & Material

12 in., 300mm Continuous CastAlloy™ cone structure, cast chassis

Low Frequency Extention

-6 dB at 20Hz (in Room)

Input Connectors

High Level Neutrik Speakon, Low Level stereo RCA, LFE RCA, SMA for wireless antenna

Power Output

550 watts (RMS)

Amplifier Type

NextGen2 Class D

Wireless Capability

Longbow (Optional), Zero Compression, Individual discrete D/A and A/D Encoders

Dimensions W x H x D

17.5 x 18 x 20 in. (444.5 x 455.5 x 507 mm)

Net Weight

78.4 lbs. (35.6 kg)


Piano Black Lacquer, 8 coats

For more information click here to visit the REL website


You haven't added any products to your basket. Why not look for some now?