Tweeter SEAS 27TBFC/GTV série PRESTIGE
[27TBFC/GTV-6] Avis/Critiques 27TBFC/GTV is a High Definition metal dome tweeter with a wide, soft polymer surround and a shielded magnet system with a rear chamber.
Aluminium/magnesium alloy diaphragm with pistonic behaviour throughout the audible frequency range, resulting in a good dispersion also above 10kHz. A Hexagrid protects the diaphragm, and supports a phase plate which compensates for a slight axial roll off towards 20 kHz.
Sonomax surround for low resonance and excellent mechanical linearity. The shielded magnet system allows use in close proximity to CRT screens. Using the screening can as a rear chamber with optimal acoustic damping allows the tweeter to be used with moderately low crossover frequencies.
Voice coil windings immersed in magnetic fluid increase short term power handling capacity and reduce the compression at high power levels. The chassis is precision moulded from glass fibre reinforced plastic, and its front
design offers optimum radiation conditions.
The frequency responses above show measured free field sound pressure in 0, 30, and 60 degrees, mounted in a 0.6m by 0.8m baffle. Input 2.83 Vrms, microphone distance 0.5m, normalized to SPL 1m. The impedance is measured without baffle using a 2V sine signal.
Nominal Impedance 6 Ohms
Recommended Frequency Range 2000 - 20000 Hz
Short Term Power Handling * 220 W
Long Term Power Handling * 90 W
Characteristic Sensitivity (2.83V, 1m) 90.5 dB
Voice Coil Diameter 26 mm
Voice Coil Height 1.5 mm
Air Gap Height 2.0 mm
Linear Coil Travel (p-p) 0.5 mm
Voice Coil Resistance 4.8 Ohms
Voice Coil Inductance 0.05 mH
Force Factor 2.8 N/A
Free Air Resonance 750 Hz
Moving Mass 0.34 g
Effective Piston Area 7.5 cm2
Magnetic Gap Flux Density 1.5 T
Magnet Weight 0.40 kg
Total Weight 0.50 kg
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