REL Acoustics Carbon Limited Subwoofer

There are 2 of these for sale.  I used them with a pair of line array speakers that benefited from subs and they were a magnificent match.  The line arrays have been replaced and I no longer need the subs. 
To the best of knowledge there were only 100 of these ever sold, hence Limited.  There are no blue book listings for the Carbon on Audiogon so I believe these may be the first pair to ever be listed here.
They are a downsized version of the 212s but used the same driver as the flagship G-1s.  REL places them in their Reference category.  They can be used as a stand alone sub or stereo as a pair to augment an audiophile stereo system.  They can also be integrated into a 5 or 7 channel home theater system.  The price is for one subwoofer.  Happy to discount price if you elect to purchase both of these rare items.

These are rated in accordance with Audiogon ratings due to slight pitting on the chrome handle and feet as depicted in the photos.  They are immaculate otherwise and rated 9 in every other regard.  Single owner, shipped in original packaging.

 

Why REL?  Only Subwoofers. 

(from REL website) 

OUR OBSESSION, MEETS YOUR OBSESSION

We make powered subwoofers. That’s it. Nothing else. No distractions. Nothing to steal our focus. No kidding ourselves that we can be good at everything. Because we have found that the perfect subwoofer can transform an entire home theater system by providing a deep floor rumbling foundation of bass, while adding depth and clarity to the mid-tones, allowing the speakers to spring to life, expanding the entire soundstage.

From the No. 25, our largest reference level subwoofer, to Serie T/i, our most accessible line, each subwoofer is designed to integrate holistically with a system of proportional power; never sacrificing quality and craftsmanship, only adjusting size and innovating on materials to strike that perfect balance of speed, power and range.

REFERENCE SOUND, SMALLER SIZE

Carbon Ltd. Is a special offering that provides a unique blend of our Reference carbon fibre 12” driver and our finest passive driver from the 212/SE, all packed into the proven S/5 chassis, which is then fitted with triple chrome plated hardware. The result is stunning, for the eyes and the ears.

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

We began with our finest 12” driver, the ultra-longstroke G-1MKII carbon fibre driver, noted for its speed and purity. To keep up with its dynamics, we 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 jewels 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 our modern capabilities in a single, compact form.

ADDITIONAL REFERENCES 

REL you.tube video: 
https://rel.net/blog/2018-01-18/product-videos/carbon-limited/
https://www.youtube.com/watch?v=kic1brOlEFg

Reviews:
https://www.tonepublications.com/review/the-rel-carbon-limited-subwoofer/