Is it normal for the woofer to move in/out slowly

Rja, thats a good question. Have no answer, however, there have been several discussions about if leaving the pre on is better than off. Based on my point of view most don't know the answer and some will offer some elaborate technical reason one way or other, its all pure speculation. Like I said I turn my on and off between listening sessions and have been doing this for years with no negative effect. I have used the same set of 6sn7 tubes over the years.

Rja also brings up a good point, repeated surges from frequent turning on I guess will affect tube life as well. May be the best compromise is to turn the pre on once a day and off for bed time :-)

Cheers

I don't think it would do any harm to the woofers.

My practice is that I always turn the pre amp on first and then the power amps. When turning them off, I turn the amps off first and then the pre amp. That way, nothing affects the woofers.

I learned a lesson a few years ago. I got a tube pre and a SS amps. When I turned off the pre amp first, a surge went to the amps and blew the fuse and some other things in the input stage. I ended up sending the amps back to the factory to repair.

This happens when I turn my Exposure 2010s2 integrated OFF. A few seconds after I hit the button I see the woofers move in then out with a kind of sucking noise at the same time. When powering on this does not happen. The 2010s2 has no tubes, it's a solid state amp. I always assumed this was not harmful.