LF21N451

SPECIFICATIONS

General specifications

NOMINAL DIAMETER:

21 inch / 533 mm

RATED IMPEDANCE:

8 ohm

PROGRAM POWER:

4000 W

POWER HANDLING CAPACITY:

2000 W

SENSITIVITY:

97 dB

FREQUENCY RANGE:

30 - 1000 Hz

EFFECTIVE PISTON DIAMETER:

470 mm / 18.5 inch

MAX. EXCURSION BEFORE DAMAGE:

72 mm / 2.83 inch

MINIMIM IMPEDANCE:

7 ohm

VOICE COIL DIAMETER:

5.3 inch / 135 mm

VOICE COIL WINDING MATERIAL:

Copper

VOICE COIL LENGTH:

39 mm / 1.54 inch

NUMBER OF LAYERS:

2

KIND OF LAYERS:

inside/outside

TOP PLATE THICKNESS:

18 mm / 0.71 inch

CONE DESIGN:

Curved

SURROUND MATERIAL:

Polycotton

SURROUND DESIGN:

Triple roll

MAGNETS:

Neodymium

DUAL-FORCE AIR VENTILATION:

Yes

SPIDER:

Dual with silicon based damping control

Thiele - small parameters

RESONANCE FREQUENCY (FS):

35 Hz

DC RESISTANCE (RE):

5.20 ohm

MECHANICAL FACTOR:

6.20 Qms

ELECTRICAL FACTOR (QES):

0.35 Qes

TOTAL FACTOR:

0.33 Qts

BL FACTOR (BL):

39.00 T x m

EFFECTIVE MOVING MASS (MMS):

434 gr

EQUIVALENT CAS AIR LOADED (VAS):

200 liters

EFFETTIVE PISTON AREA (SD):

0.17 m2

MAX. LINEAR EXCURSION (XMAX):

15 mm

VOICE COIL INDUCTANCE @ 1KHZ (LE1K):

3.20 mH

HALF-SPACE EFFICENCY (EFF):

2.40%

Mounting Information

OVERALL DIAMETER:

547 mm / 21.54 inches

BOLT CIRCLE DIAMETER:

527 mm / 20.75 inch

BOLT HOLE DIAMETER:

7 mm / 0.28 inch

FRONT MOUNT BAFFLE CUT-OUT:

512 mm / 20.16 inch

REAR MOUNT BAFFLE CUT-OUT:

512 mm / 20.16 inch

VOLUME OCCUPIED BY THE DRIVER:

7.2 liters / 0.28 ft3

Standard compliance

CE MARKING:

Yes

Size

WEIGHT:

14 kg / 30.86 lbs

HEIGHT:

260 mm / 10.24 inches

DIAMETER:

547 mm / 21.54 inches

Shipping informations

PACKAGE WIDTH:

604 mm / 23.78 inches

PACKAGE WEIGHT:

17 kg / 37.48 lbs

PACKAGE HEIGHT:

284 mm / 11.18 inches

PACKAGE DEPTH:

584 mm / 22.99 inches