21 LFA 2000 FD 4

21" LFA 2000 FD 4

Meet the 21" LFA 2000 FD 4, a cornerstone of the Dynamo Series and a premier acoustic solution for the most demanding professional environments. Engineered as a massive 21-inch low-frequency transducer, this high-excursion driver is the ultimate engine for heavy-duty subwoofers. Whether you are designing custom touring rigs, outfitting a fixed venue install, or building ground-shaking stage monitoring systems, this unit delivers the foundational low-end required for top-tier audio production. It represents the pinnacle of raw acoustic power, ready to be integrated into your most ambitious professional setups.

When it comes to acoustic output and power handling, this driver operates in a league of its own. It boasts an immense power handling capacity of 2000 AES Watts continuous and peaks at an astonishing 4000 Watts maximum power. Paired with a remarkable sensitivity of 99 dB (1w/1m), it translates heavy wattage into massive overall loudness with unparalleled efficiency. The immense dynamic headroom available here ensures that even at extreme volumes, the transducer maintains absolute clarity, preventing thermal compression and delivering devastatingly loud, articulate transients.

At the heart of this acoustic powerhouse is highly advanced driver technology. It features a sprawling 21-inch nominal diameter driven by a massive 150.6 mm (6-inch) voice coil, guaranteeing extreme cone control and unrelenting power transfer. The motor strength is derived from a robust ferrite magnet structure, which works in perfect harmony with an ultra-rigid carbon cone. While operating exclusively as a low-frequency powerhouse rather than a full-range system, its precise piston action ensures consistent, phase-accurate energy dispersion across any venue floor, seamlessly pushing air to complement your mid-high arrays.

Sonically, the frequency response is tailored for the most demanding sub-bass applications, sweeping effortlessly from a subterranean 30 Hz up to a punchy 200 Hz. This extremely focused frequency range results in a sonic character characterized by incredibly tight, gut-punching bass that forms the bedrock of any live mix. Because it is engineered for strict low-frequency acoustic purity, it allows for highly efficient crossover integration, ensuring that the low-end remains transparent and perfectly separated from the crucial midrange frequencies of your overall system.

Built for real-world value and relentless touring abuse, the physical architecture of this transducer is rock-solid. Designed to be mounted in heavy-duty custom enclosures, it features a precise 548 mm bolt circle diameter and a 496 mm baffle cut-out for secure, vibration-free rigging. Operating at a nominal impedance of 8 ohms, it is highly compatible with industry-standard professional amplification. Weighing in at an efficient 18 kg, this driver offers an incredible power-to-weight ratio, cementing its status as a highly reliable, road-worthy workhorse for any live sound professional.