REL Acoustics S/812 Subwoofer

Our Price £2,099.00 RRP £2,399.00 Save: £300.00
The REL Acoustics S/812 Subwoofer delivers the next level of performance, with a high excursion 12 inch active driver and a passive downfiring 12 inch driver for deep bass and unbelievable low end. With a power output of 800W, the S/812 is capable of handling your music and movie soundtracks with depth, dynamics and punch.

REL Acoustics S/812 Subwoofer

The S/812 subwoofer contains improved and updated technology compared to the previous generation, to extract all the extra performance possible. The S/812 produces stronger deep bass output from 19-35Hz, with improved dynamics for home cinema and a more open, spacious sound field to benefit music and movies.

The S/812 uses an aluminium ContinousCast alloy cone, backed with carbon fibre for a strong and stiff driver, to cope with the pressure produced from the 800W amplifier. The long throw driver creates louder deep bass with far more accuracy, by preventing the backwave inside the cabinet from interfering.

The passive downfiring driver on the S/812 uses specially designed suspensions, with an additional 30mm of travel for a performance beyond standard subs. The SuperProgressive passive radiator produces a loud output while retaining speed and stiffness.

The NextGen5 Class D amplifier supplies the S/812 with 800 Watts of power, along with high current to make sure the subwoofer is ready for any media. Music and movies are more immersive and inspiring with powerful yet controlled bass. With a new PerfectFilter circuit to balance the frequency extremes, producing deeper bass and more air and delicacy in the top end, the S/812 seamlessly blends with your main stereo or AV system speakers.

The REL S/812 sub also benefits from REL’s Line array, by stacking up to three units high in a stereo pair, to produce a full scale performance in a previously unheard-of sonic arrangement. This unique configuration elevates reproduction of stereo or home cinema to a floor-to-ceiling panoramic. The S/812 can also be used wirelessly with the REL AirShip wireless transmitter for zero compression signal, allowing you to easily place the subwoofer anywhere in the room without the need for cables.

REL Acoustics S/812 Subwoofer features

  • 12 inch aluminium/carbon fibre backed alloy driver
  • 12 inch SuperProgressive long travel passive bass radiator
  • NextGen5 Class D amplification at 800W
  • PerfectFilter balances frequency extremes, creating an ideal blend between sub and speakers
  • REL Line Array Subwoofer stacking for the ultimate subwoofer performance
  • Works with REL AirShip zero compression wireless transmitter for easy sub placement
More Information
Brands REL Acoustics
Product Specifications


Front-firing active driver, down-firing passive


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


12 in., 300mm Carbon/Carbon flat cone structure, steel chassis


-6dB at 19 Hz


High Level Neutrik Speakon, Low Level stereo RCA, LFE RCA, LFE XLR


800 watts (RMS)


NextGen5 Class D


Yes- REL AirShip system [required]. Sold separately


17.5 x 18 x 20 in. (430 x 455 x 514 mm)


75 lbs. (34 kg)

Blog Posts (1)
AVForums Editors Choice Awards 2020AVForums Editors Choice Awards 2020AVForums Editors Choice Awards 2020 - Best High-End Subwoofer REL S/812
Your Delivery:

Orders received before 3:00 pm* will be despatched the same day and can be delivered for next working day, (except bank holidays).  For you convenience you can choose multiple shipping options on the checkout page. We will also email with your tracking and dispatch information.

30 Day Returns Policy

HiFix is committed to selling quality products which we hope you will love, we do understand, however, that there maybe a time when you need to exchange or return something you have bought. We really do hope you are pleased with your purchase but should you wish to return anything bought from us, we will be happy to refund or exchange a product within 30 days.

*Due to the Covid situation we have amended our shipping cutoff time to 1pm. Please see more on COVID updates here.

Name SKU Qty Lead time
REL Acoustics S/812 Subwoofer Piano Black 47317 2 In Stock for Immediate Dispatch
REL Acoustics S/812 Subwoofer Piano White 47318 0 Warehouse stock usually available in 2 to 3 working days.

Warranty information for Rel Acoustics:

Rel Acoustics Warranty

Rel products are designed and manufactured to the highest quality standards. However, if something does go wrong with the product we are here to help. From your date of purchase your product is warranted against faulty materials or workmanship for a period of 36 months.

  • HiFix is a holding of Hi-Fi Excellence Ltd
  • VAT No. 585 1698 93
  • Company No. 2540830