So will the Sears auto switch described at the end of this thread work?

In theory, you plug the 990 (or 950 in my case) in along with your main amp. The main amp will only turn on when the 990 is on. On the 950, zone 2 works even though the power is off (is this the case with 990?) This means the "auto switch" will shut off the main amp when the 950 shuts off after enabling zone 2. Or am I dreaming?