Questions before building sono.

[Itay]

Hello, I wanna start my sono build and I have a few small questions :

A) when cutting the inner endcaps, do they need to be the same as the inner diameter
of the tube, or a little bigger so it would fit with some pressure ?

b) when attaching the endcaps to the tube itself, do you use just glue or somthing
else also ?

Thanks !

[Mike P.]

You want to achieve a tight fit. I used carpenters glue to glue the tube to the endcaps. Some brands of tubes have a transparent release film on the inside that glue will not stick to. This film needs to be removed, it peels off easily.

[SteveCallas]

You definitely don't want the OD of the endcaps bigger than the ID of the tube or else they will never fit in, even with a LOT of force. You'll permanently deform the tube before you'll get it to stretch much (which is why it works so well as a subwoofer enclosure).

Keep your tolerances tight enough and you can achieve an air tight fit without any need for adhesives.

[Itay]

I do have the "transparent release film" on the inside. good thing you told me.

My tube is 500mm ID so the inner endcap should be 500mm ?

[Mike P.]

My tube is 500mm ID so the inner endcap should be 500mm ?

Yes. Using glue on the endcaps can't hurt. Better safe then sorry, in my opinion.

[Itay]

Thanks !