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SB12CACS25-4

SB Acoustics SB12CACS25-4 Ceramic Midwoofer

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The SB Acoustics SB12CACS25-4 is a 4 inch 4 ohm midwoofer featuring a white ceramic cone. The ceramic layer is bonded to an aluminium substrate, this combination of materials results in an excellent stiffness to damping ratio; consequently, the midrange distortion figures are class leading. These units offer finely detailed sound and are largely impervious to the effects of daylight and domestic humidity making them an ideal alternative to paper / pulp.

Also available in 8 ohms: SB12CACS25-8

Key Features:

  • Vented cast aluminum chassis for optimum strength and low compression.
  • Soft low damping rubber surround for improved transient response.
  • Ultra hard ceramic cone for dynamic sound.
  • CCAW voice coil for reduced moving mass.
  • Non-conducting fibre glass coil former for minimal damping.
  • Faraday shorting ring in motor system for reduced distortion.
  • Vented pole piece for reduced compression.
  • Long life silver lead wires.

Basic parameters:

Resonant frequency (fs) 51 Hz Nominal impedance (Zn) 4 Ω
Mechanical  Q factor (Qms) 4.89 DC resistance (Re) 3.1 Ω
Electrical Q factor (Qes) 0.33
Max power handling 30 W
Total Q factor (Qts) 0.31
Sensitivity (2.83V/1m)
88dB
Equivalent volume (Vas) 5.7L Chassis diameter
123mm

Here's the full datasheet:

.pdf link

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