RCF |
LF21N551 |
LF21N551-8 |
11100076 |
Cone driver |
|
Brand RCF |
Model LF21N551 |
TLHP code LF21N551-8 |
Manufacturer code 11100076 |
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Product type Cone driver |
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3600 Watts continuous prgram power handling
5.3 inch Inside/Outside copper voice coil
97 dB Sensivity
30 Hz - 1 kHz Frequency range
Dual-forced air ventilation
Dual spider designed with silicon based damping control
72 mm peak to peak excursion
39 T/m BL
The LF21N551 is very high power handling 21" neodymium woofer. The combinaison of a 3600 Watts 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 combinaison 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 doby cone treatment and polycotton curround ensure a durable performance in every application.
Applications :
The LF21N551 is ideal in applications where combinations of maximum power handling, light weight and ultra fast time response are required.
Perfect for powerful lows in horn loaded sub bass systems or reflex designs. Ideal for touring, find a perfect application in high power, heavy duty, club subwoofer systems.
General |
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Product type | Cone driver |
Brand | RCF |
Reference | LF21N551 |
Product code | 11100076 |
Informations |
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Nominal impedance | 8 ohm |
Dimensional category | 21 inch |
Frequency coverage type | Sub, Low |
Manufacturer sensitivity | 97 dB |
Calculated sensitivity | 95.74 dB |
Nominal power handling | 2000 W |
Bandwidth | 30÷1000 Hz |
Fundamental parameters |
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Sd | 1700 cm² |
Mms | 434 gr |
Le | 3.2 mH |
Re | 5.2 ohm |
BL | 39 T.m |
Small signal parameters |
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Fs | 35 Hz |
Qes | 0.35 |
Qms | 6.2 |
Qts | 0.33 |
Vas | 200 L |
Datas |
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Xmax | ±15 mm |
Calculated Xmax | ±16.5 mm |
EBP | 100 Hz |
Zmin | 7 ohm |
Fs / Qts | 106 Hz |
Vas * Qts² | 21.78 L |
Efficiency | 2.4 % |
Calculated efficiency | 2.36 % |
Weight | ~16.5 kg |
Dimensions |
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Voice coil diameter | 5.3" inch |
Winding depth | 39 mm |
Gap height | 18 mm |
Outside diameter | 547 mm |
Baffle cutout diameter | 508 mm |
Front thickness | 20.5 mm |
Depth after front | 244.9 mm |
Diamètre aimant (mm) | 170 mm |
Shape & Materials |
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Front chape | Cylindrical |
Magnet type | Neodymium |
Basket masterial | Aluminium |
Winding material | Copper |
Surround material | Cloth |
This system is only available for technical questions. For questions of prices, availability of products and deadline thank you to send your request by the contact page.
* Frequency response curve of the loudspeaker taken in a hemispherical