No, the Sony M1 was the smaller replacement DAT recorder. I'm pretty sure it had most of the same functionality as the D7/D8 but was a much smaller package. I believe it had the same shell as the Sony D100, but I can't remember now what the actual difference between the two was. They were much more convenient for stealth taping, but in my opinion the D7 not only looked more robust but also peformed much better.