The Technical Pro WF12.1 raw woofer driver reproduces full frequency audio and deep lush bass. The advanced design uses a 2" ASV Voice Coil which providing the richest sound and ensuring a low distortion and a thumping movement of low end. Connect your speaker using the bare wire terminals. The structure and magnet are 50 oz. Combined with a 12" raw driver add this piece to your mid and high range speakers and build out your complete DIY audio system. The total diameter is 12" and will fit into any custom or standard 12" speaker box.