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RCF LF21N451

Subwoofer 1500W RMS – Woofer 21" – Spedizione GRATIS!

Product code: 111.00.043
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The LF21N451 is a very high power handling and efficiency transducer specially designed to provide powerful and accurate sub-bass frequencies with low distortion and low power compression.Ultra fast time response. 

The LF21N451 uses a fibre loaded cone assembly along a large triple roll surround, this combination provides remarkable strength and control.

Double silicon spider sysetm ensures excellent control during large excursions.

A fully optimised T-pole design generate the minimum amount of flux modulation.

The Dual-forced air venting system provides a very efficient voice coil ventilation to minimize the power compression.




  • Nominal Diameter:530mm / 21"
  • Rated Impedance:8 Ω
  • 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
  • Max Excursion Before Damage (peak to peak):58mm
  • Minimum Impedance:7.1 Ω
  • Voice Coil Diameter:115mm
  • Voice Coil Material:Copper
  • Voice Coil Winding Depth:34mm
  • Number of layers:2
  • Kind of layer:inside / outside
  • Top Plate Thickness:15mm
  • Cone Material:No pressed pulp carbon fiber reinforced
  • Cone Design:Curved
  • Surround Material:Polycotton
  • Surround Design:Triple roll
  • DC resistance:5.6Ω
  • 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%
  • Overall Diameter:547mm
  • Bolt Circle Diameter:527mm
  • Bolt Hole Diameter:6.5 mm
  • Front Mount Baffle Cut-out:512mm
  • Rear Mount Baffle Cut-out:512mm
  • Depth:250 mm
  • Volume occupied by the driver:6.5 liters
  • Net Weight:10.9 Kg

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