Rel Acoustic S/812
S/812 takes REL’s medium chassis concept to reference-like levels of performance and does so with style, beauty and devastating power. It delivers incredible levels of all ‘round performance for both music and film sound, gives customers a taste of what our reference models offer, and does so at a fraction of the cost.
Rel Acoustic S/812 - 12" Inch Active Subwoofer
- Home Cinema Choice gave it 5/5, praising its "enormous power and surprising subtlety" and sleek aesthetics
- AV Forums praised ease of setup, especially the high‑level Speakon input for better musical integration
- On Reddit, some noted that while DIY subs offer bang-per-buck, others overwhelmingly praised the S/812 for musicality and seamless room integration:
- Includes PerfectFilter™ and PureTheatre™ tuning filters for balance and clarity, plus a Full‑Electronic SetSafe protection system
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
High Level Neutrik Speakon, LFE RCA, LFE XLR
800 Watts (RMS)
NextGen3 Class D
Yes- REL AirShip system [required]. Sold separately.
Yes
Yes
Yes
220-240 volts, 110-120 volts for certain markets
5 Amp 220 volts operation, 9 Amp 120 volts operation
17.5 x 18 x 20 in. (430 x 455 x 514 mm)
34Kg
Yes
Yes (10 Meters Nominal)
Yes
Yes
Invisible Upgrades to S/812’s Bass Engine
Pure Carbon Fiber Backing
S/812 required upgrades to its ContinuousCast™ Alloy Cone to allow it to survive the massive power upgrades. To permit its thin, aluminum cone to survive 800 watts and incredibly long stroke, we added an ultra-lightweight backing of pure carbon fibre, strategically placed over portions of the rear surface of the cone. This produces two benefits; it strengthens and stiffens the cone and also eliminates reversion, wherein the backwave inside the cabinet is now prevented from interfering with the main launch of bass into the room. The result is more accurate and far louder deep bass.
There is Nothing Passive About These
Carbon Passive Radiator
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. This allows it to act like a sealed box compact 12” design at low volume and a high output 14” design at its limit.
Warning: Power Amplifier on Steroids
800 watts and Counting
At 800 watts the NextGen 5 amplifier is borrowed from our reference models and rocks huge reservoirs of power and current. The 45% increase in power (previous version was 500 watts) is needed to deliver both the profound output levels needed for modern theatre, as well as to produce the deepest bass in a high end 2-channel system. This increase in power is necessitated by our development on the musical front of an all-new circuit termed PerfectFilter™ that balance both frequency extremes.
PerfectFilter performs two seemingly disparate qualities; extending the strong, even response of the extreme low end of bass frequencies while simultaneously opening up air and delicacy in the middle and high frequencies of one’s system. Additionally, we applied customized PureTheatre™ filters to allow S/812 to deliver the most awe-inspiring theatre effects ever offered in a classic REL.
Serie S Line Array
Stacked for Ultimate Performance
In the real world, bass occurs with width, depth and height. By stacking up to three units per side (stereo or theatre main L-R speakers) the proper perspective and height of sonic events are illuminated. This elevates reproduction from conventional stereo or theatre to a floor-to-ceiling panoramic, full scale perspective of each sonic event. Reviewers are lining up to marvel at the transformation of music and film into the full-scale representation that REL Line Arrays uniquely deliver.
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