SB12PACR25-4-COAX

SB Acoustics SB12PACR25-4-COAX, 123mm (4.5in / 4-1/2in) Aluminum Cone with 12mm (0.5in / 1/2in) Textile Dome Coax, 4ohm.

Features
Vented reinforced plastic chassis
Anodised aluminum cone
Low damping rubber surround
Large motor system
Long stroke linear suspension
Light weight CCAW voice coil
Non-conducting fibreglass coil former
Non-resonant long life lead wires
Compact large surround dome tweeter

Specs
SPECS WOOFER:

Nominal Impedance 4 Ω
DC resistance, Re 3.1 Ω
Voice coil inductance, Le 0.25 mH
Effective piston area, Sd 45 cm2
Voice coil diameter 25.4 mm
Voice coil height 15 mm
Air gap height 5 mm
Linear coil travel (p-p) 10 mm
Magnetic flux density 1.03 T
Magnet weight 0.40 kg
Net weight 0.86 kg
Free air resonance, Fs 55 Hz
Sensitivity (2.83V/1m) 87.5 dB
Mechanical Q-factor, Qms 4.84
Electrical Q-factor, Qes 0.38
Total Q-factor, Qts 0.35
Moving mass incl. air,Mms 5.6 g
Force factor, Bl 4.0 Tm
Equivalent volume, Vas 4.3 liters
Compliance, Cms 1.49 mm/N
Mechanical loss, Rms 0.4 kg/s
Rated power handling* 30 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.

SPECS TWEETER:

Nominal Impedance 4 Ω
DC resistance, Re 3.0 Ω
Voice coil diameter 12.4 mm
Voice coil height 1.2 mm
Air gap height 1.5 mm
Free air resonance, Fs 1300 Hz
Sensitivity (2.83V/1m) 87.5 dB
Rated power handling* 10 W
Magnetic flux density 0.97 T
Magnet weight 0.003 kg
Net weight 0.014 kg