So I'm itching to get building (and listening) and started to hash out final designs.
I decided to go with a regular box and not a sonotube, only for the simple fact that I could get the cubic footage I need with a cube, and it will be easier to make something the size of an end table fit into my living room / theater. I still want to build a sonotube at some point but that might be for when I own a house at some point later on in life.
Another reason to go with a cubed box was that I couldn't settle on a tuning frequency I liked. So i decided to go with all 3 tuning frequencies I liked. I plan on using external ports. This way I can relatively easily change the length of the port as I wish. See the graph below at 1000W power with no EQ or filters to see how much of a difference in SPL it makes by changing the tuning from 14.5Hz to 21Hz.
I will probably just keep it tuned low at 14.5Hz 95% of the time but I figure I have the option to change it if I feel like it. I will be using 4" PVC and will get/make flared ends for it.
Here are the graphs for the 3 different tunes I am looking at with 7.6 CF
why 7.6 CF? Simple 24x24x25 inch box equals easy cuts out of a 4x8 foot sheet.
(4x) 24x24 inch for baffle, back, top, bottom.
and (2x) 23x24 inch for sides.
I'm going with 1/2 inch to make box light with heavy bracing internally, since driver is about 50lbs already.
renders of the cad models to come shortly.