The tuffy speaker console is designed to accept the factory sup enclosure. You can bolt an 8" woofer directly to the console but keep in mind it is not a sealed box. I bought my console used and installed the sub enclosure from my Jeep. The PO of the console had a speaker mounted inside and had lined it with dynomat. (Note I am not an audio expers so I cannot say what's the best way to do it)
2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.