Whoops! I hate it when I do that!

"The change happens gradually, though, so I'm never quite sure when it starts and when it stops."

I know what you mean. Nautilus 804s, like quite a few other speakers, change radically in the first 20-30 hours. After that, they keep changing for quite a while.
I've noticed noticeable change after almost a full year has gone by. They just seem to "disappear"...

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Lynn Olan Little