Re: Polyfill for SPL
You could cut the port down more after you add the polyfill if you feel it gives you more output.
Polyfill will absorb some energy so you may lose a little SPL. I don't know all the info but the increase in SPL from a larger internal volume may not be very large due to the loss from adding polyfill.
eBay user name: davici67zc
Sold to: MCarmer, lopaka, chuck5766 (caco), sacking74, Jelani_ellis (caco), tankglh21 (caco), bobbarker (caco)
Bought from: whitedragon551, fasfocus00