DIY

It's a pretty good rule of thumb that if the DIY comes from monetized YT channels, it's really just an ad sponsored by the components vendors.

I wouldn't build any of Toids designs for music listening. Some of his HT stuff is probably just ok, but not worth the $20 for plans plus the usually high components cost relative to performance.

Heck $20 for simple bass reflex and passive radiator box plans is pretty much a rip off there alone being simple empty boxes of simple rectangular dimensions and a crossover spec sheet. I have way more respect for people selling flatpacks their CNC router made while they were sleeping.