This guy makes a rotary subwoofer (looks more like a fan attached to a subwoofer). Some of his comments are interesting:
"This is the most useless thing I have ever built."
"I may use it only once a year to impress friends."
"Unnecessarily expensive braided cables."
Cable scammers would be proud to call this line their own:
The product, which purports to project a wearable holographic layer once plugged into a phone or other radiation/electrical-emitting device, "restores the coherence of the geometry of the atoms, which allows a perfect induction for life...
I am not sure if that has been posted here before (I did a quick search and didn't see it), but here is Steve Jobs' stereo. He seemed to like vinyl, but not tubes. Also, I think the room he had his system in looks like it has lousy acoustics...
I am looking for a new pair of headphones.
$109 for B-Stock (250 ohm).
https://www.proaudiostar.com/beyerdynamic-dt-770-pro-250.html?fbclid=IwAR131nOh_oMDdnDP0icI8v83D-yKzkQitqSpzK4wij-6CxkJu06Tu4sDPtA