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SB15CAC30-4

SB Acoustics SB15CAC30-4 Ceramic Midwoofer

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The SB Acoustics SB15CAC30-4 is a 5 inch 4 ohm midwoofer featuring a geometrically reinforced 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. Like other drive units in the CAC range, the SB15CAC30-4 has a fine detailed sound and is largely impervious to the effects of daylight and domestic humidity making it an ideal alternative to paper / pulp types.

Also available in 8 ohms: SB15CAC30-8

Key Features:

  • Vented cast aluminum chassis for optimum strength and low compression.
  • Soft low damping rubber surround for improved transient response.
  • Geometrically reinforced ceramic cone for optimal piston operation.
  • CCAW voice coil for reduced moving mass.
  • Non-conducting fibre glass coil former for minimal damping.
  • Extended copper sleeve on pole piece for low inductance / low distortion.
  • Vented pole piece for reduced compression.
  • Long life silver lead wires.

Basic parameters:

Resonant frequency (fs) 32.5 Hz Nominal impedance (Zn) 4 Ω
Mechanical  Q factor (Qms) 4.61 DC resistance (Re) 3.1 Ω
Electrical Q factor (Qes) 0.34
Max power handling 50 W
Total Q factor (Qts) 0.31
Sensitivity (2.83V/1m)
88dB
Equivalent volume (Vas) 20.2L Chassis diameter
150mm

Here's the full datasheet:

.pdf link

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