I started with the dual 10” ported box and upgraded to the dual 12”. Both sound amazing. Right now I’m running a pair of 12” Sundown sav2’s with spacer rings. It’s loud, hits hard and sounds great! I may try more powerful subs in the future. The box is built very well and weighs a ton. I’ve recommended the fox box to many others. No matter what truck I own in the future, I’ll always shop here. Great customer service and fast shipping.’