Sony MH755 earphones. These earphones were the first step to a discovery that lead me to how I do stuff now.

They were dirt cheap ($5~) earphones that came bundled with an old Sony product. There are earphones in triple digit price ranges I have tried that sound worse than these earphones do.

I was lucky to get a pair from Russia and an additional pair elsewhere years ago. Nowadays all you see on eBay are fake clones of them that come from China.

I got the earphones during a time I was trying to be a non-conformist. Was moving to Linux, installed LineageOS on my Galaxy S5, scrapped my HP laptop for an old ThinkPad. I eventually became obsessed with open-source software and started using Tor a lot, wouldn't have learned about Bitcoin at the time if I wasn't into all of this stuff first.

I still have them, with a custom firmware Sony MP3 player too: