Custom subwoofer enclosure for pickup truck

Custom subwoofer enclosure professionally built to spec for 3 JL audio 10TW3 subs . Had this in my truck since the year I bought it and this thing pounded nice and hard. Sub was installedand tuned by professional shop and installer. So wasn't abused and always ran on clean power. This enclosure cost me over $3500 to have built with the subs included. Each sub on its own is $700 plus tax plus labour and material