yes i have used it in techs box and it did help
Polyfill tricks the sub into thinking its in a larger enclosure. You can buy a 5 lb box at Walmart for about $8. Crutchfield is a rip job @ $12.99/lb... That or pull some stuffing out of an old pillow...Gonpostal said:I was looking at this on crutchfield, and people have good results with small enclosure for trucks. Will this work on techs box's?