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4in SB12CACS25-4 - SB acoustics
Features
- Vented cast aluminum chassis for optimum strength and low compression
- Ceramic cone
- Soft low damping rubber surround for improved transient response
- Shorting ring in motor system for reduced distortion
- Non-conducting fibre glass voice coil former for minimum damping
- CCAW voice coil for reduced moving mass
- Long life silver lead wires
- Vented pole piece for reduced compression
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.1 Ω
- Voice coil inductance, Le 0.26 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 1.07 T
- Magnet weight 0.40 kg
- Net weight 0.92 kg
- Free air resonance, Fs 51 Hz
- Sensitivity (2.83 V / 1 m) 88 dB
- Mechanical Q-factor, Qms 4.89
- Electrical Q-factor, Qes 0.33
- Total Q-factor, Qts 0.31
- Moving mass incl. air, Mms 6.1 g
- Force factor, Bl 4.3 Tm
- Equivalent volume, VAS 5.7 liters
- Compliance, Cms 1.60 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.
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