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SB Acoustics SB13PFCR25-4 Paper Midwoofer

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The SB13PFCR25-4 by SB Acoustics is a 5 inch 4 ohm midwoofer speaker featuring a blended paper fibre cone, a vented reinforced plastic chassis and an optimised motor system. Like other SB Acoustics plastic chassis drivers, the SB13PFCR25-4 has a smooth response and is incredible value for money.

Also available in 8 ohms: SB13PFCR25-8.

Key Features:

  • Vented reinforced plastic chassis.
  • Proprietary cone material with natural fibers made in-house.
  • Soft low damping rubber surround for improved transient response.
  • Optimised motor system.
  • Vented coil former for low compression
  • Non-resonant long life lead wires.

Basic parameters:

Resonant frequency (fs) 44 Hz Nominal impedance (Zn) 4 Ω
Mechanical  Q factor (Qms) 2.6
DC resistance (Re) 3.2 Ω
Electrical Q factor (Qes) 0.33
Max power handling 40 W
Total Q factor (Qts) 0.29
Sensitivity (2.83V/1m)
Equivalent volume (Vas) 13.4L Chassis diameter

Here's the full datasheet:

.pdf link