Soundtraxx Speaker Enclosures
Soundtraxx doesn't sell enclosures for their speakers, rather they recommend making enclosures, so I decided to make and sell them on eBay. I have been doing this since October 2015. I offer enclosures for the entire Soundtraxx line of speakers, as well as other parts for modifying locos and rolling stock. I also sell "Sugar Cube" speakers which are cheaper, better sounding, and easier to fit into locomotives. Once you try one, you will never go back. Open my eBay Store

I make all my enclosures myself out of ABS plastic usnig additive manufacturing. I test fit every one with its respective speaker before it ships out. Most of my designs now include a "shelf" on every inside corner for the speaker to sit on. These shelves also block the screw holes, so you don't have to.

Tips:
For the best sound, point it out a vent or the bottom and isolate the speaker from the inside of the shell.
Be careful to leave some clearence in front of the speaker to account for the movement of the diaphragm