F57R07	DIAMETER...........................57mm(2¼inch)
	VOICE COIL IMPEDANCE..................8ohms
	SENSITIVITY............................86dB/w/m
	NOM. POWER..............................0.25watt
	MAX. POWER................................0.4watt
	RESONANCE FREQUENCY..................680Hz
	FREQUENCY RANGE...................fo~4500Hz
	DEPTH...........................18.4mm(0.72inch)
	MOUNTING DIAMETER............36.5Ąż61.8mm
	MAGNET WEIGHT..................21.2g(0.75oz)
	NET WEIGHT........................69.5g(2.45oz)