I noticed on the Creative Sound site that Bob has released another sub in the SDX line. The SDX10 has specs of:
Fs 26 Hz, Qes 0.47, Qms 4, Qts 0.42, Vas 53 l, Re 3.5 ohms, Xmax 18.4mm, Sd 300 sq cm, Le 1.42 mH, BL 11.8 Tm, Mms 112 g, Pe 300 watts
Cabinet Suggestions
Sealed: Qtc 0.7 24 litres net, 16 oz of polyfill
Ported: 43 litres net, 3” flared port 17” long tuned to 24.5Hz, 16 oz polyfill
With a preorder price of $100 plus shipping it looks like a great deal.
http://creativesound.ca/