My best word of advice is make it as square as you can because once you got a bunch of different angles it becomes a pain in the ass.
my wall aint got a square part to it because i built it in my car and it made it an absolute nightmare making a baffle for it
Being loud is waste of money
880prs/Front-Hybrid Audio Technology Legatia L8 L3 L1v2 3-way/Sub- 3 blown MB Quart RLP-304 shallow mount 12s/Sub Amp- Visonik v2908/4ch- DD C4a
Still got a lot of stuff left to get