21 RD 2000

21 RD 2000

Introducing the 21 RD 2000, a relentlessly powerful 21-inch low-frequency transducer hailing from the elite PRO SERIES. Framed as a premier acoustic building block for custom professional audio systems, this massive subwoofer driver is specifically engineered for front-of-house touring rigs and permanent high-SPL installations. Whether it is destined to live in an under-stage bass bunker or flown as part of an expansive array, it is designed to push the boundaries of low-frequency physics and deliver unwavering performance for serious audio technicians.

Acoustic output and monumental power handling are where the 21 RD 2000 truly shines, rated for a staggering 2000 AES Watts and a peak-crushing 4000 Watts of Program Power. This staggering power capacity is further amplified by a world-class sensitivity rating of 99dB (1w @ 1m), ensuring that every watt delivered by your amplifiers translates into maximum acoustic violence. Such extreme electro-acoustic efficiency creates a vast reservoir of dynamic headroom, meaning the driver effortlessly maintains tight definition and breathtaking clarity even when reproducing explosive sub-bass transients at maximum venue volumes.

The internal architecture is a masterclass in heavy-duty driver technology, featuring an oversized 150.6mm (6-inch) voice coil designed to handle immense electrical current without thermal failure. This heavy-gauge coil sits inside a potent ferrite magnet structure, exerting brutal magnetic control over the moving mass. Attached to this motor is a state-of-the-art carbon cone, chosen specifically for its phenomenal stiffness-to-weight ratio. At 21 inches in nominal diameter, it effectively operates as an acoustic piston, moving enough air to guarantee thick, consistent, and phase-accurate coverage capable of blanketing massive outdoor crowds or cavernous indoor halls.

The 21 RD 2000 boasts a surgically precise frequency response from a chest-caving 30Hz up to a punchy 200Hz. This dedicated tuning dictates its awe-inspiring sonic character: delivering incredibly tight, articulate bass that completely avoids the sluggish, muddy overhang typical of lesser giant-format drivers. Thanks to its smooth natural roll-off and flat response within its operating window, system processors can execute incredibly efficient crossover networks, guaranteeing maximum acoustic purity and a seamless transition to your upper-frequency enclosures.

When evaluating hardware and real-world integration, this transducer is built around a heavy-duty chassis meant to be bolted securely into the thickest, most resonant-free enclosures available. Presenting a straightforward 8 Ohms nominal impedance, it allows system installers to effortlessly daisy-chain multiple drivers per amplifier channel. Astoundingly, this specific model notes a net weight of just 1 Kg on its spec sheet, highlighting an incredibly unique form-factor within the lineup. Built to survive the grueling road and ready to be mated with professional NL4 or terminal block connectors, the 21 RD 2000 is an incredibly potent, road-worthy weapon in any sound engineer's arsenal.