congrats on getting 2 great subs. i had one ten and it pounded. i did some research and basically you need to chamber off your box into 2 halves. the port diameter is 4 inches by 9 inches long. you will need one port per side. each chamber will need 2.25 cubic feet to sound the best.
remember when you calculate your dimensions for cubic feet subtract 1.5( using 3/4 mdf wood) inches from the external measurements to get the correct calculations.
take length x depth x height / 1728 to get ur cubic footage. also take your port dim of 4x 9 x 3.14/1728 and subtract from your box cubic footage. if you have any questions just pm me. i hope im clear on what ive said.
03 Ford Ranger XLT
Boss 20s on BFG 33s
K&N Drop In Filter
Dual Flowmaster 40 Series Exhaust
Jensen Touchscreen Headunit
1 10 Inch Rockford T1 10
Last edited by bpolly_2004; 11-25-2008 at 03:44 PM.