I wish I had bought myself better speakers growing up. For the better part of my late teens, I used a hand-me-down portable boombox that I used to play burned CDs from friends. It's not like these days where you can just pick up one of the best Bluetooth speakers and be done with it.
Still, had I known about better audio products — and the differences between active and passive speakers — I would’ve traded out that boombox in a heartbeat.