FDC-C402-1 { 4" - 20W - 89 dB - 4 Ohm }

Notes:
105 x 105 mm full frequency range soeaker,
Foam edge paper cone,
magnet: Φ60 x 24 x 10 mm
Nominal impedance	(Ohm)	:	4
Voice coil resistance	(Ohm)	:	3.2
Nominal power	(Watts)	:	20
Sensitivity  1W/1m	(dB)	:	89
Frequency range	(Hz)	:	140 - 20000
Free air resonance	(Hz)	:	140
Voice coil diameter	(mm)	:	20.4
Voice coil height	(mm)	:	16
Air gap height	(mm)	:	4
Voice coil inductance	(mH)	:	---
Eff.diaphragm Area	(cm²)	:	---
Moving mass	(g)	:	---
Magnet Weight	(oz)	:	114 / 4.1
Force factor	(BI)		2.04
VAS	(I)		2.94
Qms		:	2.83
Qes		:	1.58
Qts		:	1.01