19taf/dh 561 tweeter - facstaff.bucknell.edu
H 561
Response curve recorded in an anechoic chamber (Free-field, 4 pi radiation) with 0.5m microphone distance. The
loudspeaker is mounted in a 0.6m by 0.8m
baffle.
OF NORWAY
TWEETER
19TAF/D
Cumulative spectral decay
19mm High Fidelity dome tweeter with smooth, extended frequency
response. The chassis is injection moulded in high grade glass fibre
reinforced plastic. The diaphragm is made from a thin aluminium sheet
and suspended by a specially designed soft surround which allows for a
low fundamental frequency. A carefully designed diffuser protects the
diaphragm and compensates for a slight axial roll of towards 20 kHz.
The voice coil is wound on an aluminium voice coil former with
ventilating holes which eliminate problems connected with resonances in
the internal cavities. The voice coil windings are immersed in magnetic
fluid to increase short term power handling capacity, to reduce the
compression at high power levels and to significantly reduce the Q factor.
8
NOMINAL IMPEDANCE
RECOMMENDED FREQUENCY RANGE
Ohms
4000-20000 Hz
SHORT TERM MAXIMUM POWER*
220 W
LONG TERM MAXIMUM POWER*
90 W
VOICE COIL RESISTANCE
VOICE COIL INDUCTANCE (EQUIVALENT) 0.05 mH
VOICE COIL DIAMETER
VOICE COIL HEIGHT
1.5 mm
88 dB SPL
MOVING MASS
OPERATING POWER (96 dB SPL , 1 m)
6.3 W
EFFECTIVE PISTON AREA
4.0 sq.cm
LINEAR COIL TRAVEL ( p-p )
0.5 mm
AIR GAP HEIGHT
2.0 mm
MAGNETIC GAP FLUX DENSITY
1.4 T
FORCE FACTOR
2.6 N/A
MAGNET WEIGHT
0.12 Kg
TOTAL WEIGHT
0.30 Kg
0.23 g
FREE AIR RESONANCE
* IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER:
T19-202
19.5 mm
CHARACTERISTIC SENSITIVITY (1W , 1m)
NOTES
JUL.96
6.2 Ohms
5000
1700 Hz
Hz 12 dB/oct.
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