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SB Acoustics SB20PFCR30-8 8″ Woofer Paper Cone 8 ohm- ROUND

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. 

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