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LF21X451

WOOFER

The LF21X451 low frequency transducer is the result of many years of R&D developments with the goal of creating new levels of professional audio performance standards. This products features advancements and improvements in all the key areas of transducer technology.

Incredibly linear frequency response characteristics, the highest power handling of any comparable transducer, the lowest power compression. The LF21X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.

 

Applications
  • • The LF21X451 is ideal in applications where combinations of incredible power handling, reasonable weight and ultra fast time response are required.
  • • Perfect for powerful lows in horn loaded sub bass systems or reflex designs. Ideal for touring, find a perfect application in high power, heavy duty, club subwoofer systems.
Part Number
  • • 11100092
Features
  • 4,5 - inch fiberglass Inside/Outside copper voice coil
  • 4000 Watt continuous program power handling
  • 97 dB Sensitivity
  • 28 Hz - 1 kHz Frequency range
  • Dual-forced air ventilation for minimum power compression
  • Dual spider designed with silicon based damping control
  • BL of 30.5 Txm to provide a faster and accurate low frequency
General Specifications
  • Nominal Diameter: 530 / 21 mm/inch
  • Rated Impedance: 8 Ω
  • Program Power: 4000 W AES
  • Power handling capacity: 2000 W AES
  • Sensitivity: 97 dB
  • Frequency Range: 28 Hz ÷ 1000 Hz
  • Effective Piston Diameter: 470 / 18.5 mm/inch
  • Max Excursion Before Damage (peak to peak): 54 / 2.12 mm/inch
  • Minimum Impedance: 6.7 Ω
  • Voice Coil Diameter: 115 / 4.5 mm/inch
  • Voice Coil Material: Copper
  • Voice Coil Winding Depth: 34 / 1.33 mm/inch
  • Number of layers: 2
  • Kind of layer: inside / outside
  • Top Plate Thickness: 15 / 0.6 mm/inch
  • Cone Material: No pressed pulp
  • Cone Design: Curved
  • Surround Material: Polycotton
  • Surround Design: Triple roll
Thiele/Small Parameters
  • Resonance frequency: 28 Hz
  • DC resistance: 5.4Ω
  • Mechanical factor: 6.9
  • Electrical factor: 0.39
  • Total factor: 0.37
  • BL Factor: 30.5 T · m
  • Effective Moving Mass: 355 g
  • Equivalent Cas air load: 385 liters
  • Effettive piston area: 0.173
  • Max. linear excursion (mathematical): 13.5 mm
  • Voice - coil inductance @ 1kHz: 2.9 mH
  • Half-space efficiency: 2.2%
Mounting information
  • Overall Diameter: 547 / 21.5 mm/inch
  • Bolt Circle Diameter: 527 / 20.7 mm/inch
  • Bolt Hole Diameter: 6.5 / 0.25 mm/inch
  • Front Mount Baffle Cut-out: 512 / 20.1 mm/inch
  • Rear Mount Baffle Cut-out: 512 / 20.1 mm/inch
  • Depth: 230 / 9.05 mm/inch
  • Volume occupied by the driver: 6.5 / 0.229 liters/ft³
  • Net Weight: 15.5 / 34.0 kg/lbs
Shipping information
  • Shipping weight: 17.59 / 26.6 kg/lbs

The data are not binding; RCF reserves the right to modify the data at any time and without previous notice.

The data are not binding; RCF reserves the right to modify the data at any time and without previous notice.