SB ACOUSTICS SB12PFCR25-4-COAX 4” 4ohm Coaxial Ferrite Loudspeaker

SB ACOUSTICS SB12PFCR25-4-COAX 4” 4ohm Coaxial Ferrite Loudspeaker

• Vented reinforced plastic chassis
• Proprietary cone material with natural fibers made in-house
• Soft low damping rubber surround for improved transient response
• Optimized motor system
• Non-resonant long life lead wires
• Compact large surround dome tweeter

SPECS WOOFER:

• Nominal Impedance 4 Ω
• DC resistance, Re 3.1 Ω
• Voice coil inductance, Le 0.26 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 1.0 T
• Magnet weight 0.40 kg
• Net weight 0.86 kg
• Free air resonance, Fs 58 Hz
• Sensitivity (2.83V/1m) 87 dB
• Mechanical Q-factor, Qms 4.07
• Electrical Q-factor, Qes 0.36
• Total Q-factor, Qts 0.33
• Moving mass incl. air,Mms 4.5 g
• Force factor, Bl 3.8 Tm
• Equivalent volume, Vas 4.8 liters
• Compliance, Cms 1.66 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) 89 dB
• Rated power handling* 10 W
• Magnetic flux density 1.05 T
• Magnet weight 0.003 kg
• Net weight 0.014 kg