All systems operational. Royal Mail international services currently slow - other options available.



SB Acoustics SB12CACS25-8 Ceramic Midwoofer

SB Acoustics logo


The SB Acoustics SB12CACS25-8 is a 4 inch 8 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. Hard ceramic cones offer a fine 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 4 ohms: SB12CACS25-4.

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) 8 Ω
Mechanical  Q factor (Qms) 4.85 DC resistance (Re) 6.4 Ω
Electrical Q factor (Qes) 0.4
Max power handling 30 W
Total Q factor (Qts) 0.37
Sensitivity (2.83V/1m)
Equivalent volume (Vas) 6.5L Chassis diameter

Here's the full datasheet:

.pdf link