Can I Port a Sealed Sub Box

You can place a port in your now sealed box. A simple hole saw and drill will do the trick nicely. Youll have to determine the net cubic air space. (net= space left after the subwofer is in) Then determine what tune frequency you want to port the subwoofer at.

Does it matter where the port is in a sub box?

Does the placement of a port in subwoofer matter? – Quora. If you are placing the subwoofer such that the port faces the wall, the distance to the wall will affect (lower) the box tuning, as the small area in between the wall and the port effectively extends the port length.

What sounds better ported or sealed?

The sound waves are reproduced more accurately than with a ported enclosure but the subwoofers may require slightly more power from the amplifier to get the woofers to move as much as they would in a ported enclosure. Sealed enclosures are generally smaller and easier to build because there is no port to tune.