How to choose good speakers for a handmade speaker?

Question

Do it yourself

I got the idea to rivet a column with my own hands for a gift. The body is carved from wood, a pair of lithium-ion batteries, bluetooth, ̶g̶u̶b̶o̶z̶a̶k̶a̶t̶y̶v̶a̶yu̶sch̶a̶ya̶ ̶m̶a̶sh̶i̶n̶k̶a̶ and other delights. But then I realized that it was completely out of the question how to choose speakers. Low, medium, high frequencies, "passive membranes", covered ranges, how much and where ... Is there a way to calculate all this for high-quality sound without the poke method? Not a music lover, but I want it to sound expensive.
The budget for the inside is ~ 2,000 UAH (~ 5k rubles). The desired power is 15W and more.

Answer 1

if you plan to listen via bluetooth, then put ordinary car speakers for 2 tr.

Answer 2

I recommend reading the FAQ on speakers and subwoofers