So this is going in the family room, and I have pretty strict guidelines for WAF reasons. For some reason she doesn't mind some big towers, but she hates the idea of putting a couple small cubes around the room even as end tables. So the L/R need to do sub duty as well. Last restriction is no toe-in. I have my current speakers with a fair amount of toe-in, and this apparently drives her crazy. She said she just wants to go turn them every time she sees them. So I am planning to build the angle/toe-in into the cabinet to keep us both happy. I have a pretty small budget for this, although I haven't decided on an exact amount.
This is in a living room and is typically not played very loud. Loud for me is about -10 with my current speakers. Most of the time we are listening at around -30, and I might increase it to -20 to -15 if I am buy myself. This is with mains that are rated at 94db/1w/1m. I am currently using Klipsch SP-1's for L/R with no sub. They have 8" subs built into the cabinets, and they are pretty underwhelming. Whatever I do is likely to be an improvement over what I have.
What I was thinking is Bill's Designer 12 SEOS design. The Designer 12 should just barely fit in a 12.5" wide cabinet with a 30* angle. I like the Designer 12 because it fits, and it is relatively inexpensive. The Delta 12a also fits and is a similarly price, but the Dayton seems to do better in a small sealed box. The 30* angle has the speaker aiming just slightly outside of the seating positions. At 12.5" wide and a 30* angle, I should have a baffle 14.5" wide which is what the design uses. For LF, I was thinking of using the remaining cabinet volume for a sub. With the angle, I won't be able to mount the sub on the front baffle without it hitting the side of the cabinet; however, I should be able to shoe-horn one in the back. A 12" should just barely fit on the back if I don't recess the driver. I don't think mounting the driver on the outside will fly, but I might be able to mount it on the inside. An entertainment console will sit between the two speakers. If I go with a 12" on the back, I was thinking of the Infinity 1260w because it works well in small volumes and it is cheap. If I extend the depth of the tower and use the open space behind the sealed designer 12, I could probably get enough volume to port it. I can probably go about 19" deep on the short side, and about 26.5" on the long side which gives me ~144L volume for the entire cabinet minus bracing, drivers, ports, etc. I haven't decided on what amp I will use for the subs.
So, I am wondering if anyone sees any issues with what I am thinking, or if anyone has any better suggestions.