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musical instrument details
RCF LF21N551 - 21", 2000 W RMS, 4000 W program, 5.3" coil, Woofer
Estimated price for orientation: 1 069 $
Category: RCF LF21N551 21quot 55quot VC 20
Class:
Description Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition Brand: RCF Model: LF21N551 Type: Standalone Speaker Horn MPN: LF21N551 UPC: Does not apply
The RCF LF21N551 is very high power handling 21” neodymium woofer. The combination of a 3600 Watt power handling and a minimum weight of 13,7 Kg makes this transducer a unique product in his category.The transducer design is based on a very strong neodymium magnetic structure and a new 5,3” inside-outside copper coil. The new Dual forced design provide an excellent heat dissipation and lower power compression. Special air-forced ventilations are provided for voice coil, magnet assembly and basket. The combination of carbon fibre loaded cone assembly, large triple roll surround, double silicon spider provides to the LF21N551 remarkable strength and best control under large excursion conditions.A fully optimised T-pole design generate the minimum amount of flux modulation offering a peak to peak excursion of 72 mm. The waterproof body cone treatment and polycotton surround ensure a durable performance in every application.RCF LF21N551 Features:5.3 - inch Inside/Outside copper voice coil4000 Watt continuous program power handling97 dB Sensitivity30 Hz - 1 kHz Frequency rangeDual-forced air ventilation for minimum power compressionDual spider designed with silicon based damping controlBL of 39 Txm to provide a faster and accurate low frequencyRCF LF21N551 Specifications:General Specifications Nominal Diameter: 530 / 21 mm/inch Rated Impedance: 8 Ω Program Power: 4000 W AES Power handling capacity: 2000 W AES Sensitivity: 97 dB Frequency Range: 30 Hz ÷ 1000 Hz Effective Piston Diameter: 470 / 18.5 mm/inch Max Excursion Before Damage (peak to peak): 72 / 2.83 mm/inch Minimum Impedance: 7.1 Ω Voice Coil Diameter: 135 / 5.3 mm/inch Voice Coil Material: Copper Voice Coil Winding Depth: 39 / 1.54 mm/inch Number of layers: 2 Kind of layer: inside / outside Top Plate Thickness: 18 / 0.71 mm/inch Cone Material: No pressed pulp carbon fiber reinforced Cone Design: Curved Surround Material: Polycotton Surround Design: Triple roll Thiele/Small Parameters Resonance frequency: 35 Hz DC resistance: 5.2Ω Mechanical factor: 6.2 Electrical factor: 0.35 Total factor: 0.33 BL Factor: 39 T · m Effective Moving Mass: 434 g Equivalent Cas air load: 200 liters Effettive piston area: 0.173 m² Max. linear excursion (mathematical): 15 mm Voice - coil inductance @ 1kHz: 3.2 mH Half-space efficiency: 2.40% 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: 245 / 9.65 mm/inch Volume occupied by the driver: 7.2 / 0.25 liters/ft³ Net Weight: 13.7 / 30.2 kg/lbs Shipping information Shipping weight: 15.2 / 33.51 kg/lbs
Description
| Condition: | New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition | Brand: | RCF |
| Model: | LF21N551 | Type: | Standalone Speaker Horn |
| MPN: | LF21N551 | UPC: | Does not apply |
The RCF LF21N551 is very high power handling 21” neodymium woofer. The combination of a 3600 Watt power handling and a minimum weight of 13,7 Kg makes this transducer a unique product in his category.The transducer design is based on a very strong neodymium magnetic structure and a new 5,3” inside-outside copper coil. The new Dual forced design provide an excellent heat dissipation and lower power compression. Special air-forced ventilations are provided for voice coil, magnet assembly and basket. The combination of carbon fibre loaded cone assembly, large triple roll surround, double silicon spider provides to the LF21N551 remarkable strength and best control under large excursion conditions.A fully optimised T-pole design generate the minimum amount of flux modulation offering a peak to peak excursion of 72 mm. The waterproof body cone treatment and polycotton surround ensure a durable performance in every application.RCF LF21N551 Features:5.3 - inch Inside/Outside copper voice coil4000 Watt continuous program power handling97 dB Sensitivity30 Hz - 1 kHz Frequency rangeDual-forced air ventilation for minimum power compressionDual spider designed with silicon based damping controlBL of 39 Txm to provide a faster and accurate low frequencyRCF LF21N551 Specifications:General Specifications Nominal Diameter: 530 / 21 mm/inch Rated Impedance: 8 Ω Program Power: 4000 W AES Power handling capacity: 2000 W AES Sensitivity: 97 dB Frequency Range: 30 Hz ÷ 1000 Hz Effective Piston Diameter: 470 / 18.5 mm/inch Max Excursion Before Damage (peak to peak): 72 / 2.83 mm/inch Minimum Impedance: 7.1 Ω Voice Coil Diameter: 135 / 5.3 mm/inch Voice Coil Material: Copper Voice Coil Winding Depth: 39 / 1.54 mm/inch Number of layers: 2 Kind of layer: inside / outside Top Plate Thickness: 18 / 0.71 mm/inch Cone Material: No pressed pulp carbon fiber reinforced Cone Design: Curved Surround Material: Polycotton Surround Design: Triple roll Thiele/Small Parameters Resonance frequency: 35 Hz DC resistance: 5.2Ω Mechanical factor: 6.2 Electrical factor: 0.35 Total factor: 0.33 BL Factor: 39 T · m Effective Moving Mass: 434 g Equivalent Cas air load: 200 liters Effettive piston area: 0.173 m² Max. linear excursion (mathematical): 15 mm Voice - coil inductance @ 1kHz: 3.2 mH Half-space efficiency: 2.40% 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: 245 / 9.65 mm/inch Volume occupied by the driver: 7.2 / 0.25 liters/ft³ Net Weight: 13.7 / 30.2 kg/lbs Shipping information Shipping weight: 15.2 / 33.51 kg/lbs