As I recall, yes. I think maybe it spun the source spool as well as the feeder spool in the tray. Most cassette decks only mechanically rotate the feeder spool while the source spool just spins freely in time with the feeder spool. However, since the 8 Track adaptor worked this way, it wound up feeding tape faster than the feeder could spool it up. Voila! Instant magnetic tape bottleneck.