RCF LF21X451 - LIGHTWEIGHT HIGH POWER 21" WOOFER 

SUPER STRONG CHEST POUNDING BASS DOWN TO 28HZ THANKS TO ITS HIGH 13.5MM XMAX!

RCF LF21X451

Item Price: $731.95

WOOFER MODEL

LF21X451

SPECIFICATIONS

Nominal Basket Diameter

21"

Impedance

8 ohms

AES Power Rating

2,000 Watts

Program Power 4,000 Watts

Frequency Response

28Hz - 1.0kHz

Sensitivity (1W/1m)

97dB

Voice Coil Diameter

4.5" / 5mm

Max. Excursion Before Damage 2.28" / 115mm
Voice Coil Winding Depth 1.3" / 34mm
Number Of Layers 2
Kind Of Layer Inside/Outside

MATERIALS

Cone Material No Pressed Pulp-Carbon Fiber Reinforced
Cone Design Curved
Voice Coil Material Copper
Diaphragm Material Paper Pulp
Surround Material Polycotton
Surround Design Triple Roll
Magnet Ferrite

MOUNTING INFORMATION

Overall Diameter

21.5" / 547mm
Bolt Circle Diameter 20.7" / 527mm
Baffle Cutout Diameter 20.1" / 512mm
No. Of Mounting Holes 8
Mounting Hole Diameter 0.25" / 6.5mm
Overall Depth 9.05" / 230mm
Flange Thickness .6" / 15mm
Volume Displaced By Driver 6.5 Liters / .229ft^3
Net Weight 15.5 kg. / 34 lbs.
Shipping Weight 17.59 kg. / 38.7 lbs.

THIELE-SMALL PARAMETERS

Resonant Frequency (fs) 30 Hz
Impedance (Re) 5.4 ohms
Coil Inductance (Le) 3.0mH
Electromagnetic Q (Qes) .39
Mechanical Q (Qms) 6.9
Total Q (Qts) .37
BL Factor 30.5TM
Moving Mass (Mms) 355 grams
Compliance Equivalent Vol. (Vas) 385 liters/13.59cu. ft.
Voice Coil Overhang (Xmax) 13.5mm
Surface Area Of Cone .173m2
Reference Efficiency 2.2%
FREQUENCY RESPONSE
RXF LF21X451 Frequency
IMPEDANCE CURVE
MOUNTING INFORMATION

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