I just need some advice on building my frist subwoofer... I am trying to built an (transmission line subwoofer) with either an (Pioneer TS-W304C 12") or an (CERWIN-VEGA HED12 12") and I got the box worked out and everything... all i donno is if i should use that speakers also I need the Crossover and preamp. if anyone got any good design with schematic that u think suit my need, please msg me... and this is for home use...thanx... and I got this box design off someone... so tell me if I should use this