RCF WOOFER. LF21N401
507,50 Add to cart

RCF WOOFER. LF21N401

507,50

Brand: RCF
Article number: LF21N401

  • 4.0 – inch Inside/Outside copper voice coil
  • 3000 Watt continuous program power handling
  • 98.0dB Sensitivity
  • 25Hz – 1kHz Frequency range

Description

  • 4.0 – inch Inside/Outside copper voice coil
  • 3000 Watt continuous program power handling
  • 98.0dB Sensitivity
  • 25Hz – 1kHz Frequency range
  • Dual-forced air ventilation for minimum power compression
  • Dual spider designed with silicon based damping control
  • BL of 27.6 T/m to provide a faster and accurate low frequency
The LF21N401 is a high power handling and efficiency transducer specially designed to provide powerful and accurate sub-bass frequencies with low distortion and low power compression. With a fast time response, the LF21N451 uses a fiber loaded cone assembly along a large triple roll surround. This combination provides emarkable strength and control. Double silicon spider system ensures excellent control during large excursions. A fully optimized 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.

  • General specifications
    • Nominal Diameter: 21 inch / 533 mm
    • Rated Impedance: 8 ohm
    • Program Power: 3000 W
    • Power handling capacity: 1500 W
    • Sensitivity: 98.0 dB
    • Frequency range: 25 – 1000 Hz
    • Effective piston diameter: 470 mm / 18.5 inch
    • Max. Excursion Before Damage: 60 mm / 2.36 inch
    • Minimim Impedance: 7.0 ohm
    • Voice Coil Diameter: 4.0 inch / 102 mm
    • Voice Coil Winding Material: Copper
    • Voice Coil Length: 31 mm / 1.22 inch
    • Number of layers: 2
    • Kind of layers: inside/outside
    • Top Plate Thickness: 15 mm / 0.59 inch
    • Cone Design: Curved
    • Surround Material: Polycotton
    • Surround Design: Triple roll
    • Magnets: Neodymium
    • Dual-force air ventilation: Yes
    • Spider: Dual with silicon based damping control

  • Thiele – small parameters
    • Resonance frequency (Fs): 30 Hz
    • DC resistance (Re): 5.00 ohm
    • Mechanical factor: 6.80 Qms
    • Electrical factor (Qes): 0.40 Qes
    • Total factor: 0.37 Qts
    • BL factor (BL): 27.60 T x m
    • Effective moving mass (Mms): 318.0 g
    • Equivalent Cas air loaded (Vas): 374.0 liters
    • Effettive piston area (Sd): 0.120 m2
    • Max. linear excursion (Xmax): 11.0 mm
    • Voice coil inductance @ 1kHz (Le1k): 1.70 mH
    • Half-space efficency (Eff): 2.50%

  • Mounting Information
    • Overall diameter: 547 mm / 21.54 inches
    • Bolt circle diameter: 527 mm / 20.75 inch
    • Bolt hole diameter: 6 mm / 0.24 inch
    • Front mount baffle cut-out: 512 mm / 20.16 inch
    • Rear mount baffle cut-out: 512 mm / 20.16 inch
    • Volume occupied by the driver: 6.5 liters / 0.26 ft3

  • Standard compliance
    • CE marking: Yes

  • Size
    • Weight: 8.8 kg / 19.4 lbs
    • Height: 234 mm / 9.21 inches
    • Diameter: 547 mm / 21.54 inches

  • Shipping informations
    • Package Width: 585 mm / 23.03 inches
    • Package Weight: 10 kg / 22.05 lbs
    • Package Height: 605 mm / 23.82 inches
    • Package Depth: 605 mm / 23.82 inches

Additional information

Weight 10 kg
Dimensions 605 × 585 × 605 cm
Brand

Nominal Diameter

21 inch / 533 mm

Rated Impedance

8 ohm

Program Power

3000 W

Power handling capacity

1500 W

Sensitivity

98.0 dB

Frequency Range

25 – 1000 Hz

Effective Piston Diameter

470 mm / 18.5 inch

Max Excursion Before Damage

60 mm / 2.36 inch

Minimim Impedance

Voice coil diameter

Voice Coil Winding Material

Voice Coil Length

Number of layers

Kind of layers

Top Plate Thickness

Cone Design

Surround Material

Surround Design

Magnets

Dual-force air ventilation

Spider

Resonance frequency (Fs)

DC resistance (Re)

Mechanical factor

Electrical factor (Qes)

Total factor

BL factor (BL)

Effective moving mass (Mms)

Equivalent Cas air loaded (Vas)

Effettive piston area (Sd)

Max. linear excursion (Xmax)

Half-space efficency (Eff)

Overall diameter

Bolt circle diameter

Bolt hole diameter

Front mount baffle cut-out

Rear mount baffle cut-out

Volume occupied by the driver

CE marking

Weight

Height

Diameter

Package Width

Package Weight

Package Height

Package Depth