ok i wanted to post this so i can let you guys no i understand now why i was wrong and so that i dont mislead anyone by my incorrect box results for the volfenhags. The reason i got the box size wrong is that i used linear teams online box program and the qtc according jonathan is coming out wrong. So i got another program and ran another woofer that him and i have been talking back and forth on and now my qtc matches his. So now i ran the volfenhags again and they will work in only a slightly larger box then recomended by factory for daily use. ps....for the record a 54 hz tune looked promising in the 3.40 cf box minus decrease of air for woofer basket etc for the s 10 extended cab we had them in to peak at his 59 hz resonant frequency.