Subwoofer SB-Acoustics 12" SB34SWPL76-3-DV Paper Speaker

Features
Long stroke design
Linear high stability suspension
Higher shore hardness rubber surround
Dual 3’’ copper voice coil
Non-conducting reinforced fibre glass coil former
Very stiff hard paper cone (made in-house)
Vented cast aluminium chassis
Large vented motor system and vented coilformer
Long life silver lead wires

Specs
Nominal Impedance 2 x 3 Ω
DC resistance, Re 2 x 2.5 Ω
Voice coil inductance, Le(par./ser.) 1.4/6.1 mH
Effective piston area, Sd 458 cm2
Voice coil diameter 75.5 mm
Voice coil height 38 mm
Air gap height 8 mm
Linear coil travel (p-p) 30 mm
Magnetic flux density 0.62 T
Magnet weight 2.4 kg
Net weight 7.7 kg
Free air resonance, Fs 27.5 Hz
Sensitivity (2.83V/1m) 90/85 dB
Mechanical Q-factor, Qms 5.62
Electrical Q-factor, Qes 0.52
Total Q-factor, Qts 0.48
Moving mass incl. air,Mms 231 g
Force factor, Bl(par./ser.) 9.7/19.5 Tm
Equivalent volume, Vas 43 liters
Compliance, Cms 0.14 mm/N
Mechanical loss, Rms 7.1 kg/s
Rated power handling* 300 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.