port-seal

[audiothings]

I'm building a speaker, the woofer of which models well in both sealed and vented boxes (Dayton DC300).

I want to first try it ported, and if I find the bass to be too flabby, I will want to seal it. This will be done before the box is finished with veneer. The box construction is 2 x 17mm particleboard sandwiching a layer of bitumen roofing felt.

Can I just screw on the front panel, so that I can later unscrew it to seal the ports? Will the particleboard be able to take this abuse? Is there any way of sealing it from the outside, before finishing it with veneer?

Any other easy way to experiment with and without ports?

[Inductor]

Maybe a (2x) small panel (in the back?) with four screws, one with the port and changeable to the one that is flat (without the port). You can always go back like this.
Maybe it helps, if you look at the JBL 4350B - Studio Monitor http://audio-heritage.jp/JBL/speaker/4350bwx.JPG it could be a left or right side according.

[Arty]

tip: vented + glasswool = suicide attempt.
the vent will make sure air in the room has many small glass particles.
you do not want that.
use rockwool.

[infinia]

Hi,
depending on the plastic pipe or port tube you select there are expanding plugs available. Most are using a wing nut to compress a rubber gasket sealing the inside diameter of the pipe. plumbing supply dealers should be aware of these thingys.
This way you can change your mind back and forth.

[makingmoney]

On my sub I use it sealed for music for cleaner bass.

For movies I open the port for more fun bass power.