4″ SB12PFCR25-8 / Paper
Features
- Vented reinforced plastic chassis
- Proprietary cone material with natural fibers made in-house
- Butyl rubber surround for smooth frequency response
- Vented motor system for low compression
- Long stroke linear suspension for improved dynamics
- Non-resonant long life lead wires
Specs
- Nominal Impedance 8 Ω
- DC resistance, Re 6.4 Ω
- Voice coil inductance, Le 0.36 mH
- Effective piston area, Sd 50 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 0.84 T
- Magnet weight 0.32 kg
- Net weight 0.7 kg
- Free air resonance, Fs 59 Hz
- Sensitivity (2.83 V / 1 m) 84 dB
- Mechanical Q-factor, Qms 3.63
- Electrical Q-factor, Qes 0.55
- Total Q-factor, Qts 0.48
- Moving mass incl. air, Mms 4.9 g
- Force factor, Bl 4.6 Tm
- Equivalent volume, VAS 5.3 liters
- Compliance, Cms 1.48 mm/N
- Mechanical loss, Rms 0.5 kg/s
- Rated power handling* 30 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.