l11rc/ph 759 woofer
H 759
OF NORWAY
WOOFER
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 2.5 l net. volume
L11RC/P
L11RC/P is a 4.5" High Fidelity mini woofer with a stiff and stable
injection moulded metal chassis. The stiff, yet light aluminium cone
and the low loss rubber surround show no sign of the familiar 500-1500 Hz
cone edge resonance and distortion assosiated with soft cones. On the
other hand, the cone break up modes at higher frequencies call for
special attention in the crossover design work. The high temperature voice
coil wound on an aluminium voice coil former gives high power handling
capacity. A bullet shaped phase plug reduces compression due to
temperature variations in the voice coil, avoids resonance problems which
would occur in the volume between the dust cap and the pole piece and
increases the long term power handling capacity. The unit may be used in
small two way systems producing an astonishingly deep bass and a clean,
neutral midrange.
NOMINAL IMPEDANCE
RECOMMENDED FREQUENCY RANGE
SHORT TERM MAXIMUM POWER *
200
Ohms
VOICE COIL RESISTANCE
Hz
VOICE COIL INDUCTANCE (EQUIVALENT)
W
FORCE FACTOR
W11-211
Ohms
mH
6.0
N/A
70
W
FREE AIR RESONANCE
53
Hz
CHARACTERISTIC SENSITIVITY (1W , 1m)
85
dB SPL
MOVING MASS
6.8
g
W
AIR LOAD MASS IN IEC BAFFLE
0.2
g
SUSPENSION COMPLIANCE
1.3
mm/N
12.5
VOICE COIL DIAMETER
26
mm
SUSPENSION MECHANICAL RESISTANCE
1.1
Ns/m
VOICE COIL HEIGHT
12
mm
EFFECTIVE PISTON AREA
50
sq.cm
AIR GAP HEIGHT
6.0
mm
LINEAR COIL TRAVEL ( p-p )
6.0
mm
MAXIMUM COIL TRAVEL ( p-p)
9.0
mm
MAGNETIC GAP FLUX DENSITY
0.9
T
MAGNET WEIGHT
0.25
Kg
TOTAL WEIGHT
0.75
Kg
VAS
QMS
QES
QTS
* = IEC 268-5
OCT. 96
5.5
0.65
LONG TERM MAXIMUM POWER*
OPERATING POWER (96 dB SPL , 1 m)
NOTES
8
55-3500
4.6 Litres
2.1
0.35
0.30
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