It can be done on a Macbook because a Macbook is not a passive speaker.

A Macbook comprises an entire audio system, with amplification and DSP and everything else that a passive speaker -- by its very nature -- can never provide.

I explained this once. If you read through it, and take the time to understand it, and then think that you can explain it with superior brevity, then by all means: Feel free. :)

If you have questions, then: Please ask them.

If you think you can also defy what are commonly accepted to be real physical constraints and produce a tiny passive practical speaker that sounds great, then: By all means, do that as well! The proceeds of this kind of success can make you very wealthy -- maybe not Mars-mission wealthy, but probably at least beach house, private flights, and built-to-spec Porsche 911 GT3-level wealthy. You'll then be able to take time to decide what your next venture is, or perhaps decide to just live with that level of lavishness doing whatever makes you happy until your days run out.

People with fresh ears are born every day.