When a friend of mine surprised me asking if I wanted some old car speakers instead of throwing them away, I couldn’t say no…
But then they sat inside a cabinet for more than a year because I had nothing to do with them, until I came across a pair of broken loudspeakers.

I decided to remove the front plastic cover and see if they’d fit, one of them did but they were missing the hole for the tweeter.

From the picture you can see that both speakers are dual way, and this would have caused the presence of too many high tones, so I decided to disconnect the tweeter coil from the lower JBL speaker and add a capacitor in series with the small, Alpine speaker that will now work as tweeter.
The capacitor will act as a high pass filter and leave out all the low frequencies from the small speaker.

Unfortunately though, the only hole saw I had was a bit bigger than the diameter of the tweeter, and the loudspeaker had two open vertical slots that I couldn’t really leave there if I wanted to make an enclosed loudspeaker.
To solve the two problems I 3D printed a gasket to adapt the small speaker to the bigger hole, and I shaped two wood pieces with a handsaw to fit in the slots.

Everything then has been glued, the gaps filled with silicone and the surface painted black.
I also got a roll of adhesive wood grain, covered the silver outer surfaces of the loudspeakers, stuffed the inside with some cotton wadding and screwed the speakers in place.

I couldn’t leave the front ugly and visible like that of course, so I decided to make a mesh cover using some leftover wood from another project and some black cloth.

Overall the speakers turned out to be very good considering from what I started from.
I am currently using them with the subwoofer unit of a LM1875 based 2.1 sound system (that for some reason had its satellites speakers missing) and attached it to my computer.

In the end they can make for some very nice loudspeakers for general purpose, occasional music, video calls and YouTube videos. The highs are nice and crisp and the words very comprehensible.
I wouldn’t call this Hi-Fi, but it’s pleasant enough to allow me to not always use my headphones and have my hair always messy.