Can confirm. The most important test for my mixes is the car test. Get your buddies together, and hopefully they have a variety of cars. Play it in a nice car with great speakers, play it in a shitty beater with a blown out cone in the passenger door, and as many in between as you can get. The more homogenous the listening experience is across those cars, the better your mix will sound on a variety of systems.

For most people, their car is the best sound system they own. It’s also where people do a lot of listening, because very few people drive in complete silence. So if it sounds like ass in the car, people will stop listening.