The stock Alpine subwoofer is a dual two ohm voice coil unit sized at 8" in diameter. The entire face is 8.5" and it's 4" in depth.
Two remove the subwoofer from it's box, you must remove the Torx head bolts which are sized at 25. Then, remove the two 18mm bolts holding the box into the cargo tray. Unplug the box, flip it over, and remove the phillips head bolt on the bottom of the box. Turn the box over and remove the subwoofer by disconnecting each of the wiring harnesses.
In my opinion, the plastic box is not suitable for a stronger subwoofer. It will just resonate and flex and the mounting ring is paper thin. The stock Alpine subwoofer is appropriate for this type of enclosure and any need to add more or a different style of bass response should be handled by a different amplifier and subwoofer/enclosure.
Two remove the subwoofer from it's box, you must remove the Torx head bolts which are sized at 25. Then, remove the two 18mm bolts holding the box into the cargo tray. Unplug the box, flip it over, and remove the phillips head bolt on the bottom of the box. Turn the box over and remove the subwoofer by disconnecting each of the wiring harnesses.
In my opinion, the plastic box is not suitable for a stronger subwoofer. It will just resonate and flex and the mounting ring is paper thin. The stock Alpine subwoofer is appropriate for this type of enclosure and any need to add more or a different style of bass response should be handled by a different amplifier and subwoofer/enclosure.