p21rfx/ph 512 woofer

p21rfx/ph 512 woofer
H 512
OF NORWAY
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.
WOOFER
P21RFX/P
P21RFX/P is an 8" High Fidelity woofer with an injection moulded metal
chassis. This woofer is a further development of our P21REX, but with
a 2" voice coil. It is equipped with a high loss rubber surround and a
polypropylene cone which contribute to a smooth frequency response
and low colouration. The magnet system is designed to give excellent field
symmetry, and consequently low distortion. A bullet shaped phase plug
reduces compression due to temperature variations in the voice coil,
avoids resonances which would occur in the volume between the dust cap
and the pole piece and increases the long term power handling capacity.
A large magnet system providing high efficiency and low Q makes this woofer
suitable for small, high efficiency bass reflex cabinets.
NOTES
NOMINAL IMPEDANCE
RECOMMENDED FREQUENCY RANGE
8
Ohms
32-2500 Hz
SHORT TERM MAXIMUM POWER *
300
LONG TERM MAXIMUM POWER *
125
W
VOICE COIL RESISTANCE
mH
FORCE FACTOR
11
N/A
W
FREE AIR RESONANCE
34
Hz
90
dB SPL
MOVING MASS
22
g
OPERATING POWER (96 dB SPL ,1 m)
4.0
W
AIR LOAD MASS IN IEC BAFFLE
1.9
g
SUSPENSION COMPLIANCE
1.0
mm/N
VOICE COIL DIAMETER
51
mm
SUSPENSION MECHANICAL RESISTANCE
3.0
Ns/m
VOICE COIL HEIGHT
14
mm
EFFECTIVE PISTON AREA
194
sq.cm
AIR GAP HEIGHT
6.0
mm
LINEAR COIL TRAVEL ( p-p )
8.0
mm
18
mm
MAGNETIC GAP FLUX DENSITY
1.05
T
MAGNET WEIGHT
1.00
Kg
TOTAL WEIGHT
2.70
Kg
VAS
QMS
QES
QTS
* = IEC 268-5
W21-502
Ohms
0.8
CHARACTERISTIC SENSITIVITY (1W,1m)
MAXIMUM COIL TRAVEL ( p-p)
OCT. 96
6.4
VOICE COIL INDUCTANCE (EQUIVALENT)
48.3 Litres
1.70
0.27
0.23
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