Seems a lot of higher end decks don’t come with covers so my guess is it doesn’t make a difference or better to be off. Great to keep dust off is probably all it does.
Turntable lid up or off?
My Pro-Ject Classic turntable came with a dust cover. I usually spin vinyl with the cover completely removed and never closed. Does it matter if the cover is just up or fully removed? The ultimate test is just listening, but I cannot detect a difference between either mode (up or completely off).