SB Acoustics SB20PFC30-8 8" Paper Cone Woofer- 8 ohm

Sale Price: $27.00
Compared at: $39.40
You Save: $12.40


Manufacturer: SB Acoustics
Product ID : SB20PFC30-8
Weight: 6.00 lbs
Manufacturer: SB Acoustics
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SB Acoustics SB20PFC30-8 8" Woofer Paper Cone 8 ohm

This 8" papyrus fiber paper cone woofer is a great value for this build quality and performance.  The specifications make it a good choice for many different enclosure types.  An extended and smooth frequency response suggests simple crossovers, even none at all.  

SB Acoustics SB20PFC30-8 8" Woofer Preliminary Data Specification Sheet PDF


  • Vented reinforced plastic chassis
  • Proprietary cone material with natural fibers made in-house
  • Soft low damping rubber surround for improved transient response
  • Large spider for improved linearity
  • Optimized motor system
  • Vented coil former for low compression
  • Non-resonant long life lead wires
Some possible box alignments:

Sealed box of 0.5 to 0.75 cubic foot for a 3dB down of about 70Hz

Vented box of 0.75 cubic foot with 2" Ø vent by 5" long for f3 of 55Hz
Vented box of 1.0 cubic foot with 2" Ø vent by 4" long for f3 of 49Hz
Vented box of 1.25 cubic feet with 2" Ø vent by 3.5" long for f3 of 45Hz
Vented box of 1.5 cubic feet with 2" Ø vent by 3" long for f3 of 42Hz

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Product Reviews

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Reviewed by AlexTF1
AlexTF1 bought "SB Acoustics SB20PFC30-8 8" Paper Cone Woofer- 8 ohm" on our website
12/27/2017 - 06:59:24 AM
High quality bass
This product offers a lot of excursion without large distortion, from Fs up, so it not compress in low frequencies. Some more expensive options in the market don't have such bass performance. Very good choice for a serious bass woofer in various systems, including FAST ones or multi way. In short, five (or even six) star for bass, at good price!
Midrange/low treble is somewhat ragged if one wants first class frequency response (but is not raspy or shouty). In this case is better to add a small midrange. Fortunately the extended response will permit a low order filter for this usage.
The voice coil inductance variation with excursion are not first class, although is good for its simple magnet system.
Because of these details I don't give it 5 stars, but at that price is impossible to make all at same time...