8 Track tape thingys
8 tracks had good sound and depth except for the cross channeling from the other tracks. That's what the matchbook was good for. It jacked up the tape so it would track correctly. It was always sad when your favorite tape started to get garbled and you pulled it out of the player to find that 5' of tape was wrapped up inside of the player. If you could get the tape out I could always get ti back inside the case but that spot in the tape was always distorted when it played. They are a cool design. The tape pulls out of the center, makes a loop past the play heads and wraps back up around the outside.