[Beginner] Best DIY speaker type for nightmare room

[rthorntn]

I might clone the blade shape in a bookshelf with my existing subs.

 

[mattstat]

room treatments are out of the question

Have you seen the newer style acoustical absorbers that you can print art/images on? Maybe you can get away with those. Multiple companies make them.

https://www.gikacoustics.com/product-category/acoustic-art-panels/