Woofer NRX SB-Acoustics 10" SB29NRX75-8 Norex Speaker

Features
Hard paper cone for improved piston operation (made in-house)
Vented pole piece for minimum compression
Vented cast aluminum chassis for optimum strength and low compression
3” copper voice coil for improved power handling
Long life silver lead wires
Low damping rubber surround for improved dynamic linearity
Non-conducting fiber glass voice coil former for minimum damping

Specs
Nominal Impedance 8 Ω
DC resistance, Re 6.2 Ω
Voice coil inductance, Le 2.3 mH
Effective piston area, Sd 312 cm2
Voice coil diameter 75.6 mm
Voice coil height 28 mm
Air gap height 6 mm
Linear coil travel (p-p) 22 mm
Magnetic flux density 0.9 T
Magnet weight 2.1 kg
Net weight 5.40 kg
Free air resonance, Fs 26 Hz
Sensitivity (2.83V/1m) 88 dB
Mechanical Q-factor, Qms 7.06
Electrical Q-factor, Qes 0.39
Total Q-factor, Qts 0.37
Moving mass incl. air,Mms 58.9 g
Force factor, Bl 12.4 Tm
Equivalent volume, Vas 85.6 liters
Compliance, Cms 0.63 mm/N
Mechanical loss, Rms 1.4 kg/s
Rated power handling* 200 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.