45 degree placement in squarish room?

They don't need to be equidistant from the shared corner. Using this set-up you can be more flexible in how you place the speakers. Use your ears to judge.

My room is not small at 17 x 25 but I have used a diagonal set up for years with excellent results, Far better than any symetrical set up I have ever tried in this room. The speakers are not even close to equidistant from any wall surface. My left speaker is several feet to the left of the corner and the right speaker is about 9 feet out of the left corner along the wall. Don't let anyone tell you what you should or shouldn't like. This set up works extremely well.

i have a diagonal placement in a 11 x 14 room. not exactly 45 degrees..more like 30-60.
advantage is a huge depth..but what gets compromised in my setup is the width (and to some extend the shape) of the soundstage.

but the bass response/midrange are so much better than the standard placement in my room.

No, in my case, they are not even close to equidistantand the orientation is more like 25-30 degrees than 45 and the right speaker is about 4-5 feet out to the right from the corner and the left about 3-4 feet out to the right of teh corner to the left with teh two speakers about 7 feet or so apart. My listening position is about 4-5 feet back from the speakers near the rear wall. Yes, use your ears to determine what works best.

Thanks! I'm finding for my room, after all these years, is that this position is yielding the best results ever...I would have thought this the craziest situation in the past. Until you hear it, live and learn, I'd say...