SB Acoustics

SB Acoustics Satori WO24P-8 9.5'' Egyptian Papyrus Cone Woofer

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  • Hard paper cone for improved piston operation (made in-house)
  • Large optimized motor system with under-cut pole piece and dual shorting rings
  • Vented aerodynamic cast aluminium chassis for optimum strength and low compression
  • Soft low damping rubber surround for optimum transient response
  • Linear symmetric suspension design for improved dynamic performance
  • Non-conducting fibre glass voice coil former for minimum damping
  • Long life silver lead wires attached 180° apart for improved stability
  • Vented pole piece for reduced compression
  • Low piston to chassis diameter ratio
  • Gasket and bolt hole protrusions for reduced coupling to speaker cabinet


  • Nominal Impedance 8 ?
  • DC resistance, Re 5.8 ?
  • Voice coil inductance, Le 0.56 mH
  • Effective piston area, Sd 255 cm2
  • Voice coil diameter 49.5 mm
  • Voice coil height 23 mm
  • Air gap height 6 mm
  • Linear coil travel (p-p) 17 mm
  • Magnetic flux density 1.1 T
  • Magnet weight 1.36 kg
  • Net weight 3.7 kg
  • Free air resonance, Fs 24.5 Hz
  • Sensitivity (2.83V/1m) 88 dB
  • Mechanical Q-factor, Qms 5.7
  • Electrical Q-factor, Qes 0.41
  • Total Q-factor, Qts 0.38
  • Moving mass incl. air,Mms 44.5 g
  • Force factor, Bl 9.9 Tm
  • Equivalent volume, Vas 87.5 liters
  • Compliance, Cms 0.95 mm/N
  • Mechanical loss, Rms 1.2 kg/s
  • Rated power handling* 90 W

* IEC 268-5, T/S parameters measured on drive units that are broken in.

Customer Reviews

Based on 1 review
Outstanding and one-of-a-kind

This is a very peculiar driver. It is large enough to deliver room-filling bass, it's almost 10". It has an Fs of 24Hz, which lets it go really low in a small enclosure. It can be used in a sealed 20-litre enclosure almost without any equalisation and will still deliver bass deep enough for double-bass or rock. And it does all this together with a flat SPL curve which goes into the KHz range, with a moving mass much lighter than the SB29NRX classical high-end woofer. This one has a moving mass of 44g while that has 78g. So, this can handle higher frequencies than almost any other 10" woofer. I'm using this in a 3-way sealed box with an MR13 mid and a TW29R tweeter, for an all-Satori high-end monitor speaker. It may be larger than desktop speakers but will be average size for general monitors. I'll drive this with a Hypex FA123 with active equalisation and crossover.

This is the only 10" driver I can think of which can mate with the Satori 2" dome midrange, because the dome needs to be crossover at 1KHz or higher, 4th order.