I like the build you did here! Let me know if I should start a separate thread for my questions but I think we have similar theater room dimensions and I am considering a similar build. My concern is the dimensions of the end enclosure and I am wondering what can be done to maintain the quality while reducing the dimensions. Also, are the recommendations for the same sub and amp still for today's products that are available?
My room is ~800sq ft plus a staircase and I will be using it primarily for movies with some occasional music listening. My problem is I am not clear on how to calculate proper sizing of a sub-woofer for diameter, watts, and SPL given listening styles and room size. Any help here would be appreciated. I am debating whether a DIY route would be better than the alternative I have been considering which is the SVS PB-2000 for $800. Also it should be noted that the existing speakers that I plan to start with were installed by the house's previous owner are in the ceiling and are Klipsch CDT-3650-C I believe (3x upfront and 2x in back)