No, I have not ever built my own audio equipment. Building my own speakers looks like a fun way to save money on speakers, and have a custom audio setup.
Nope and I hardly doubt I ever see myself doing so.
If your college or university forces you to take a college level Physics, electronics or Engineering class, there is a possibility that you may have to make a speaker to learn about magnetism, vibrations, and electrical currents.
Oh trust me, they force me to take a lot of BS stuff but thankfully none of that stuff.
That's good. I think community colleges University transfer programs for people who want to transfer to a University or another college sometimes force students to take physics, biology and chemistry which forces you to make stuff and do labs, and write long lab reports on what you built, and what you learned.
Needing to take un-needed courses may make a lot of students decide to go to a technical/trades school where they just learn how to fix cars, electronics, or cook. But, they may still need to take writing classes to learn how to write a cover letter, resume, and business letters.
Sounds like I should have went to a technical school.