You read that correctly, I'm making a fibreglass ported box for 10 Ten inch subwoofers. In this video I go through the plan, and begin construction of the box.

jat4011, with a Tahoe featuring 15 15" Subs-
   / jat4011  

Budget Audiophile, with a home theatre featuring over 18 18" subs-
   / @budgetaudiophile6048