25tac/gw h 417 tweeter
H 417
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
25TAC/GW
Cumulative spectral decay
25mm High Fidelity dome tweeter with glass fibre reinforced plastic
chassis. The unit features high efficiency and smooth, extended response.
Its aluminium diaphragm with critically designed shape and thickness
behaves like a piston throughout the audible frequency range, resulting in
good dispersion above 10 kHz. A fine mesh grid protects the diaphragm,
and supports a phase plate which compensates for a slight axial roll off
towards 20 kHz. The specially designed soft surround allows excellent
mechanical linearity. A damped hole in the pole piece and a tuned chamber
behind the magnet result in a low resonance frequency. The unit is
equipped with flexible lead out wires, allowing relatively low crossover
frequencies to be used.
6
NOMINAL IMPEDANCE
RECOMMENDED FREQUENCY RANGE
Ohms
2000-25000 Hz
SHORT TERM MAXIMUM POWER*
150 W
LONG TERM MAXIMUM POWER*
60 W
VOICE COIL RESISTANCE
VOICE COIL INDUCTANCE (EQUIVALENT) 0.05 mH
VOICE COIL DIAMETER
26 mm
VOICE COIL HEIGHT
1.5 mm
CHARACTERISTIC SENSITIVITY (1W , 1m)
91 dB SPL
MOVING MASS
OPERATING POWER (96 dB SPL , 1 m)
3.2 W
EFFECTIVE PISTON AREA
7.0 sq.cm
LINEAR COIL TRAVEL ( p-p )
0.5 mm
AIR GAP HEIGHT
2.0 mm
MAGNETIC GAP FLUX DENSITY
1.8 T
FREE AIR RESONANCE
660 Hz
FORCE FACTOR
3.5 N/A
NOTES
MAGNET WEIGHT
0.25 Kg
TOTAL WEIGHT
0.50 Kg
* IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER:
JUL.96
T25-303
4.8 Ohms
0.33 g
3000
Hz 12 dB/oct.
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