Don't seal the port if you're not replacing the woofer itself. If you are planning on replacing tha OEM speaker with an aftermarket one then yes, seal the port. A subwoofer and it's box work as a team. That box with it's port were designed to be used with that speaker. Seal the port and it's just another sealed box where the necessary parameter is it's volume and you can pug in any speaker suitable for that volume. Others here have successfully used the OEM woofer as is and replaced the amplifier.does it really make a difference for the stock sub to fill the port in the back?
I wouldn't advise it. The power wires to the OEM amp are probably going to be too small to provide enough current to a larger amp. You could start a fire that way!:evil:what about for the power supply from the stock amp? does anyone know how much power it is getting? can you take that power wire that powers the stock amp and splice it into the aftermarket amp?