Hey guys! The Steve Jobs your looking at here is the owner of the website: www.pud.com where you can see al lthe fun mods the guy did to a headphone to make it sound different. The following text is from mister Pud here explaining what this headphone is:

A "Helmholtz resonator"is that thing when you blow on a Coke bottle and it plays a low pitch.

The pitch can be tuned by adjusting its dimensions. Ol'Thumby (The headset on the photo -Kyoyeou) has a resonator tuned to 60hz (Bass territory -Kyoyeou) with the "neck" radius of 50mm (same as the driver I'm using).

If you're interested in trying something like this yourself, there are Helmholtz resonator calculators online, or ask ChatGPT to help you calculate. Here's the calculator I used: www.omnicalculator.com/physics/helmholtz-resonator