The 212 Black Label is REL Acoustics' flagship model in the Serie S range, occupying the pinnacle of a line designed for listeners who demand the greatest possible scale, speed, and authority in bass reproduction. Where other Serie S models serve large rooms with distinction, the 212 Black Label is designed for the most demanding spaces and the most ambitious system builds, whether as the sole subwoofer anchoring a reference home cinema or as a stereo pair creating a line-array-like bass foundation beneath a world-class two-channel system.
Driver Configuration
The 212 Black Label deploys two front-firing 12-inch active drivers built around REL's CarbonAlloy cone technology. The cones combine a carbon-fibre centre cap with long-throw aluminium die-cast chassis surrounds, producing the combination of stiffness, lightness, and controlled breakup that REL specifies for a driver that must articulate both deep sub-bass texture and mid-bass dynamics at high output levels. Complementing the two active drivers are a further two 12-inch passive radiators, one firing rearward and one firing downward. Together, all four drivers present over 1,166 square centimetres of total piston area.
Amplification
A 1,000-watt RMS Linear Class D amplifier drives the active pair. REL describes the topology as a hybrid design that takes the current delivery and sonic qualities of high-current Class A/B monoblocks and combines them with the efficiency of a Linear Class D output stage. At peaks the amplifier is capable of sustaining over 1,200 watts for extended periods, while idle consumption is kept to a modest 40 watts. Protection circuitry covers Electronic Set Safe, D.C. Fault, and Output Short conditions.
Cabinet and Finish
The cabinet is finished in Piano Black Lacquer applied in eight coats, giving the 212 Black Label a deep, mirror-like surface that reflects its status as REL's reference product. A single vertical strake runs the full height of the cabinet, capped at the top by a distinctive crown badge. The side handles are bead-blasted in a warm silver finish with a titanium character, and solid billet aluminium internal bracing manages resonance within the enclosure structure.
Connectivity
All signal filtering in the 212 Black Label uses purely analogue circuitry. The signature High-Level Input connects via a Neutrik Speakon socket, drawing signal directly from the loudspeaker outputs of the partnering amplifier. A second Speakon output allows daisy-chain connection to a second subwoofer. Low-Level RCA inputs (two) accommodate a standard line-level subwoofer output, and a dedicated LFE input accepts both RCA and XLR connections for home cinema integration. All three input paths can be used simultaneously in hybrid music and cinema applications.
Wireless Integration
The 212 Black Label is fully compatible with the REL AirShip Direct wireless system (available separately), which transmits wide-bandwidth compound signals carrying both the High-Level and .1/LFE signals simultaneously, preserving the same performance characteristics as a wired connection across a room without visible cables.