Not too weird, but I found this accidentally: a subwoofer under my bed (the speakers that came with it broke)
I found a ten hour long brown noise mp3 that is set to loop indefinitely on an old burner phone. Through the subwoofer it sounds exactly like the warp engines from Star Trek TNG. Incredibly comforting, and hard to sleep without
Logitech z313 is what I got, I just checked my order history and it was like $57. I'm going to try to track down a link for the audio file I use. I have the file, but I don't remember the source
That'd probably be fine. I mean I haven't tested it a lot, but I think the secret sauce is just that it's all bass from the subwoofer. Let me know how it goes