No woodwork skills needed. Just a drill and a saw. Anyone could build this with hardware store parts. 6" drain PVC, 1-1/2" PVC, a 1-1/2 to 2" bushing, 2" coupler, and two 6" caps. The coupler is used to hold the bushing in the 6" cap from the back side. 6" PVC is 15" long. Port is 10" long. File the lip off the inside of the bushing so the port can be pressed into it from the inside. Port lenght can vary from a few inches to a foot depending on the sub used and the tuned frequency. Tune it then glue it. My "subwoofer" was just some el-cheapo 6" speaker I had laying around but it's loud enough to fill in the missing low end of a stock Mecury SUV. Hits as low as the 12" that came out just not as loud.