RCF LF21X451 WOOFER
FEATURES
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4.5 - inch fiberglass Inside/Outside copper voice coil
-
4000 Watt continuous program power handling
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97 dB Sensitivity
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28 Hz - 1 kHz Frequency range
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Dual-forced air ventilation for minimum power compression
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Dual spider designed with silicon based damping control
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BL of 30.5 Txm to provide a faster and accurate low frequency
SPECIFICATIONS
- Nominal Diameter: 530 / 21 mm/inch
- Rated Impedance: 8 Ohm
- 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 Ohm
- 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: 5.4?
- 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 m²
- 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
