Build a Custom Suitcase Boom Box!
Speakers + Vintage Suitcase = Awesome Sound?
A more nuanced explanation of the Ohm rating is coming next week. But to add to what was stated in the episode- most car speakers are rated at 4 Ohms. If you properly match your speakers and amp, 4 or 8 Ohm speakers will work... 4 ohm speakers are just harder to drive, so make sure you have enough amp if you pick 'em.