good box design

i have a peerless xxls 12" 830844 and i need a decent box design for this sub.

i am new to this program and i am looking for some good low bass that i can still feel, i maybe asking to much from this sub but thats just what i want.

is anyone able to come up with a box??

would be greatly appreciated

fs 17.7 hz

qms 8.21

qts 0.2

qms 0.2

175wrms

12.5 xmax

D 24.4

vas 156.5 L

sensitivity 90.3db

sd 466cm2