Tina Turner 1939-2023



SB Acoustics SB34NRXL75-8 Norex Woofer

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Optimised for bass reflex designs:

The SB Acoustics SB34NRXL75-8 is a 12 inch 8 ohm woofer / bass speaker featuring a Norex cone, a large high power motor system and a vented cast aluminium chassis. Norex is a proprietary paper based material comprised of wood pulp and selected natural fibres blended for an optimally strong but lightweight cone that gives extended pistonic action.

Also available in 6 ohms: SB34NRX75-6 and a high Qts 16 ohm version: SB34NRX75-16.

Key Features:

  • Hard paper cone for improved piston operation (made in-house).
  • Large motor system with under-cut pole piece and dual shorting rings.
  • Vented pole piece for minimum compression.
  • Vented cast aluminium chassis for optimum strength and low compression.
  • 3″ copper voice coil for improved power handling.
  • Long life silver lead wires.
  • Low damping rubber surround for improved dynamic linearity.
  • Non-conducting fibre glass voice coil former for minimum damping.
  • Optimised for vented enclosure.

Basic parameters:

Resonant frequency (fs) 22 Hz Nominal impedance (Zn) 8 Ω
Mechanical  Q factor (Qms) 5.5
DC resistance (Re) 6.2 Ω
Electrical Q factor (Qes) 0.29
Max power handling 200 W
Total Q factor (Qts) 0.28
Sensitivity (2.83V/1m)
Equivalent volume (Vas) 205L Chassis diameter

Here's the full datasheet:

.pdf link