Sealing ported enclosure to reduce boom

There aren't many placement choices when I room is 13x15. Speakers can only be so close to you. The Cardas site recommends (width of room)x(.447)=distance of speaker front to rear wall. That would be 5.5' for me almost putting them in the middle of the room.
I stuffed the ports and they sound pretty good, much better then when I first auditioned them. But maybe there could be some adverse effects when the woofer is sucking in air thru the port. It might not have enough air available to push as per design.

I like Duke's ideas!

I've seen the port diameter trick done professionally to improve performance.

Never tried the straws approach but it sounds good!

Thanks, Mapman!

I use a modular port system in many of my designs, and on several occasions being able to ship a longer center section to a customer has saved the day.

The ability of the end user to make this sort of adjustment is a significant, and under-appreciated, advantage of ported enclosures over most other types. There is simply too much variation on boundary reinforcement from one room to another, as well as from one location to another within a room, for a successful "one size fits all" approach to bass tuning. Imho, of course.

Duke

I stuffed the port with polyfill. I guess if you completely cut off the airflow in the port the movement of the drivers will be compromised.
The ports are shaped like an "L" I think and are big (I can fit my hand inside). I don't know how I would be able to modify the port size without a lot of construction.
I haven't had this problem in this room (and in the same place) with other speakers (B&W, Polk, JBL, Infinity 7).