[cody69]

I'm planning a tower speaker arrangement with a sub-woofer located at the base and the speaker in the upper section. The network will be located in the lower sub cavity, requiring the wires for the speaker to pass through a panel (3/4" MDF) separating the speaker enclosure from the sub-woofer.

What is a good way to run two 14 gauge wires through the internal panel separating the sub and speaker, and provide a lifetime air-tight seal?

[jmimac351]

Hot Glue gun / stick works well for this.  Could also use RTV.

https://www.permatex.com/products/adhesives-and-sealants/adhesives-sealant/permatex-clear-rtv-silicone-adhesive-sealant-3-oz/

This is a picture of the top chamber of my Merlin VSM speaker.  This chamber is where the crossover and Esotar tweeter were mounted.  These are 2 of Danny's 16ga solid core copper wires.  The circle you see around it is where the hot glue had puddled from the previous wires being fed thru that hole to the woofer in the chamber below. 

So, hot glue about the diameter of a quarter and it will flow where it needs to and get happy.  Easy. 

The debris behind it is what is left from removing a large Hovland inductor that was in a paper tube.  That required a hammer and chisel.

So, don't go crazy with the glue either...