RCF LF21N451 Premium Quality 21" Low Frequency Woofer 4.5" Voice Coil 3000W 80ohm 30Hz.-1KHz (11100043) - NEW

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Sale price$1,799.99 Regular price$2,899.99

Description

General Specifications

  • Nominal Diameter: 530 / 21 mm/inch
  • Rated Impedance: 8 Ohms
  • Program Power: 3000 W AES
  • Power handling capacity: 1500 W AES
  • Sensitivity: 98.5 dB
  • Frequency Range: 30 Hz - 1000 Hz
  • Effective Piston Diameter: 470 mm / 18.5 inch
  • Max Excursion Before Damage (peak to peak): 58 mm / 2.28 inch
  • Minimum Impedance: 7.1 Ohms
  • Voice Coil Diameter: 115 mm / 4.5 inch
  • Voice Coil Material: Copper
  • Voice Coil Winding Depth: 34 mm / 1.33 inch
  • Number of layers: 2
  • Kind of layer: inside / outside
  • Top Plate Thickness: 15 mm / 0.6 inch
  • Cone Material: No pressed pulp carbon fiber reinforced
  • Cone Design: Curved
  • Surround Material: Polycotton
  • Surround Design: Triple roll

Thiele/Small Parameters

  • DC resistance: 5.6 Ohms
  • Mechanical factor: 6
  • Electrical factor: 0.27
  • Total factor: 0.26
  • BL Factor: 34.5 T · m
  • Effective Moving Mass: 315 g
  • Equivalent Cas air load: 375 liters
  • Effettive piston area: 0.173 m²
  • Max. linear excursion (mathematical): 13.2 mm
  • Voice - coil inductance @ 1kHz: 3.0 mH
  • Half-space efficiency: 4.0%

Mounting information

  • Overall Diameter:547 mm / 21.5 inch
  • Bolt Circle Diameter: 527 mm / 20.7 inch
  • Bolt Hole Diameter: 6.5 mm / 0.25 inch
  • Front Mount Baffle Cut-out: 512 mm / 20.1 inch
  • Rear Mount Baffle Cut-out: 512 mm / 20.1 inch
  • Depth: 250 mm / 9.8 inch
  • Volume occupied by the driver: 6.5 litres / 0.229 ft³
  • Net Weight: 10.9 kg / 24 lbs

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