H 225 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 19TNF Cumulative spectral decay 19mm High Fidelity dome tweeter with a specially designed soft diaphragm. The chassis is injection moulded in glass fibre reinforced plastic. The unit features high efficiency and wide dispersion due to a moderate horn loading and a small diaphragm. 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 VOICE COIL RESISTANCE 0.05 mH VOICE COIL DIAMETER 19.5 mm SHORT TERM MAXIMUM POWER* 200 W LONG TERM MAXIMUM POWER* 80 W VOICE COIL HEIGHT CHARACTERISTIC SENSITIVITY (1W , 1m) 90 dB SPL MOVING MASS OPERATING POWER (96 dB SPL , 1 m) 4.0 W EFFECTIVE PISTON AREA 4.0 sq.cm LINEAR COIL TRAVEL ( p-p ) 0.5 mm NOTES AIR GAP HEIGHT 2.0 mm MAGNETIC GAP FLUX DENSITY 1.4 T FORCE FACTOR 2.6 N/A MAGNET WEIGHT TOTAL WEIGHT T19-002 1.5 mm 0.20 g FREE AIR RESONANCE 1700 Hz 0.12 Kg 0.30 Kg * IEC 268-5, VIA HIGH PASS BUTTERWORTH FILTER: APR.97 6.2 Ohms VOICE COIL INDUCTANCE (EQUIVALENT) 5000 Hz 12 dB/oct.
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