Hi I'm Alex
I recently purchased a set of Polk Audio RTI A7's.
I brought them mainly for music playback but soon found out that they perform better in a HT configuration.
I later found out (through pain staking research) that plugging the ports (lower front and rear for bass and upper front for mids) would tighten the response of the drivers an turn them into a set of awesome music playback speakers; and it did.
I started with socks then move to form the I had custom made.
My question is can I use rubber stoppers instead of sock or foam?
I feel that this will prevent any air from escaping causing an even tighter driver response and turn the enclosure into a totally seal cabinet.
I have a Cerwin Vega cv-1800 amp (connected via a Nad 1155 preamp and im using an Ipad 3 for a Jukebox) that has more than enough power to drive them in this configuration; and as far a tv viewing I saw Battleship the other day and it was as good if not better than being at the theater.
Thank in advance