Merkmale
  • 5.3 - inch Inside/Outside copper voice coil
  • 4000 Watt continuous program power handling
  • 97 dB Sensitivity
  • 30 Hz - 1 kHz Frequency range
  • Dual-forced air ventilation for minimum power compression
  • Dual spider designed with silicon based damping control
  • BL of 39 Txm to provide a faster and accurate low frequency

The 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.


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Part number:

11100076
LF21N551
8ohm

Spezifikationen
Allgemeine spezifikationen
Nominal Durchmesser
21 inch / 533 mm
Anschlussimpedanz (Ohm)
8 ohm
Programm Power (Watt)
4000 W
Belastbarkeit
2000 W
Empfindlichkeit (dB)
97.0 dB
Frequenzbereich
30 - 1000 Hz
Nenndurchmesser Membran
470 mm / 18.5 inch
Maximale Auslenkung vor Schaden
72 mm / 2.83 inch
Minimale-Impedanz (Ohm)
7.1 ohm
Schwingspulendurchmesser
5.3 inch / 135 mm
Schwingspulenträgermaterial
Copper
Spulenlänge
39 mm / 1.54 inch
Layeranzahl
2
Art von Schichten
inside/outside
Obere Polplattenstärke
18 mm / 0.71 inch
Konusdesign
Curved
Surround Material
Polycotton
Surround Design
Triple roll
Magnet
Neodymium
Doppelbelüftung (Innen/Aussen)
Yes
Spinne
03
Thiele - small parameters
Resonanzfrequenz (Fs) (Hz)
35 Hz
Gleichstromwiderstand (Re) (Ohm)
5.20 ohm
Mechanische Güte (Qms)
6.20 Qms
Elektrische Güte (Qes)
0.35 Qes
Gesamt Q-Faktor (Qts)
0.33 Qts
Kraftfaktor (BL-Factor) (T x m)
39.00 T x m
effektiv bewegte Masse (Mms)(g)
434.0 g
Äquivalentes Luftnachgiebigkeitsvolumen (Vas) (Liter)
200.0 liters
effektive Membranfläche (Sd) (m2)
0.170 m2
Maximale lineare Auslenkung (Xmax) (mm)
15 mm
Schwingspuleninduktivität L @ 1kHz (Le1k) (mH)
3.20 mH
Halbraum-Wirkungsgrad r=1m (eff) (%)
2.40%
Montagehinweise
Gesamtdurchmesser
547 mm / 21.54 inches
Lochkreis Durchmesser
527 mm / 20.75 inch
Lochdurchmesser
7 mm / 0.28 inch
Ausschnittsgröße bei frontaler Montage
512 mm / 20.16 inch
Schallwandöffnung für rückseitige Montage
512 mm / 20.16 inch
Vom Treiber verdrängtes Volumen (bei frontaler Montage)
7.2 liters / 0.28 ft3
Standardkonformität
Safety agency
CE compliant
Größe / Gewicht
Höhe
260 mm / 10.24 inches
Durchmesser
547 mm / 21.54 inches
Gewicht
14 kg / 30.86 lbs
Versandinformationen
Verpackung Höhe
284 mm / 11.18 inches
Verpackung Breite
604 mm / 23.78 inches
Verpackung Tiefe
584 mm / 22.99 inches
Verpackungsgewicht
17 kg / 37.48 lbs
Downloads
DATENBLÄTTER
PDF
933 KB
18-10-2024
PDF
61 KB
11-07-2024
ZEICHNUNGEN
DXF
2,5 MB
22-01-2024
PDF
554 KB
22-01-2024
PDF
477 KB
21-03-2018
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