w21ex-001 woofer
WOOFER
W21EX-001
8 Ohms
NOMINAL IMPEDANCE
RECOMMENDED FREQUENCY RANGE
SHORT TERM MAXIMUM POWER *
LONG TERM MAXIMUM POWER*
CHARACTERISTIC SENSITIVITY (1W, 1m)
OPERATING POWER ( 96 dB SPL ,1 m )
VOICE COIL DIAMETER
E 004
30-3000 Hz
250 W
120 W
91,0 dB SPL
3,2 W
VOICE COIL HEIGHT
AIR GAP HEIGHT
LINEAR COIL TRAVEL ( p-p )
39
18
mm
mm
6.0
12,0
mm
mm
MAXIMUM COIL TRAVEL ( p-p)
MAGNETIC GAP FLUX DENSITY
MAGNET WEIGHT
TOTAL WEIGHT
19
1,0
0,64
2,16
mm
T
Kg
Kg
VOICE COIL RESISTANCE
VOICE COIL INDUCTANCE (EQUIVALENT)
FORCE FACTOR
FREE AIR RESONANCE
MOVING MASS
AIR LOAD MASS IN IEC BAFFLE
SUSPENSION COMPLIANCE
SUSPENSION MECHANICAL RESISTANCE
EFFECTIVE PISTON AREA
VAS
QMS
QES
QTS
6,4 Ohms
0.32 mH
8,5 N/A
31 Hz
26 g
2,0 g
1,2 mm/N
2,0 Ns/m
220 sq.cm
63,8 Litres
2,73
0.48
0.41
* IEC 268-5
Response curve recorded in anechoic chamber (Free-field, 4 pi radiation) with 0.5m microphone distance.
The loudspeaker is mounted in a closed box of 20 l net. volume
The W21EX-001 is an 8" cone driver developed for use as a high fidelity Woofer. Choose it when
you want piston-like behavior without resonance, smooth extended frequency response, linearized
driving force, and low.
SPECIAL FEATURES:
Natural rubber surround and a specially treated, hard paper cone which is designed to be very stiff
without losing the damping capability of paper and requires no additional coating.
Perfectly matched moving parts for a smooth, extended frequency response.
Large magnet system for improved sensitivity and transient response.
Heavy copper rings mounted above and below the T-shaped pole piece, to reduce non linear and
modulation distortion and increase overload margin.
Copper plating of the top and bottom plates and a solid copper phase plug, which enhance the
performance of the copper rings and improve heat conduction away from the pole piece.
Gold plated terminals mounted on a stiff bakelite plate to reduce contact resistance and improve
reliability.
Stiff and stable injection moulded metal basket to keep the critical components in perfect alignment.
OCT. 96
EW 21-002
Distortion on axis in % between 25 and 2000 Hz at operating power.
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