MODEL??	FBF57-1T
DIMENSION??	57mm  x  8.5mm
VOICE COIL IMP??	8 ohm
SOUND PRESSVRE LEVEL?¡§S.P.L????	88 dB
RESONAT FREQUENEY??	340 Hz
EFFECTIVE FREQUENEY??	fo-18000 Hz
NOISE POWER??	0.5 w
MAGNET SIZE AND ASSEMBLY??	12.5mm Alnico