21” woofer 4000 watts LF21X451 RCF

The LF21X451 low-frequency transducer is the result of many years of R&D development aimed at creating new levels of professional audio performance standards. This product features advancements and improvements in all key areas of transducer technology. Incredibly linear frequency response characteristics, the highest power handling of any comparable transducer, and the lowest power compression. The LF21X451 features a fiber-loaded cone assembly coupled with a high-excursion triple roller and constant geometry surround: this combination provides remarkable strength and a maximum peak-to-peak excursion of 54 mm. The new dual forced hyperventilation system ensures highly efficient voice coil ventilation for minimal power compression and incredible power handling.

• 4.5 inch indoor/outdoor fiberglass copper voice coil.


• 4000 watt continuous program power handling.


• Sensitivity of 97dB.


• 28 Hz - 1 kHz Frequency range.


• Dual forced air ventilation for minimal power compression.


• Double spider designed with silicone-based damping control.


• 30.5 Txm BL to provide faster and more accurate low frequency.


• This product has a 1-year warranty against factory defects.