Polymat Quality 3ft X 48" Wide Charcoal Speaker Box Carpet Sub Box Polymat Carpet Truck Car Trunk Liner, Dash Cover, Interior Headliner Automotive Carpet

so you built a subwoofer box and you know you want to carpet it how do you get those clean precise cut lines on the ends of the box and on the subwoofer box port that's coming up in this car audio fabrication quick the first step for making perfect carpet seams is prep work when we design our subwoofer box the side panels of that subwoofer box should be inset and completely surrounded on all sides with the rest of the subwoofer box assembly what we can then do is take that side panel and use a Brava ting bit on a router and cut around the outside perimeter making a notch like this after assembling the subwoofer box this notch gives us a great transition point that we can use as a guide to run a razor blade when we cut the carpet this makes the carpet cut clean and precise we can use this same technique on a subwoofer box port after we've cut out our port we use a roundover bit and we in