SB Acoustics Midwoofer NRX SB15NRX2C30-8 30mm Voice coil

Nominal Impedance

8 Ω

Free air resonance, Fs

39 Hz

DC resistance, Re

5.9 Ω

Sensitivity (2.83 V / 1 m)

86 dB

Voice coil inductance, Le

0.14 mH

Recommended Frequency Range

Effective piston area, Sd

82 cm2

Mechanical Q-factor, Qms

4.18

Voice coil diameter

30.5 mm

Electrical Q-factor, Qes

0.40

Voice coil height

15 mm

Total Q-factor, Qts

0.36

Air gap height

5 mm

Moving mass incl.air, Mms

9.2 g

Linear coil travel (p-p)

10 mm

Force factor, Bl

5.8 Tm

Magnetic flux density

1.0 T

Equivalent volume, Vas

16.9 liters

Magnet weight

0.54 kg

Compliance, Cms

1.80 mm/N

Net weight

1.46 kg

Mechanical loss, Rms

0.5 kg/s

Rated power handling*

50 W

* IEC 268-5, T/S parameters measured on drive units that are broken in.