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

My only tubed piece is the pre-amp. It is the only piece I turn off when not in use. I noticed that when I turn it off the woofers on my speakers move in and out rather slowly while I hear what I assume are the tubes discharging.

Is that normal and more importantly can it cause damage to the speakers?

Thanks
bokfudo
bokfudo OP
58 posts
 
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
audiolui
280 posts
 
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.
fusion10
50 posts
 
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.
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