I keep it down when listening to my SL-1200 MK2. Most of my other tables don't have dust covers. Up seems like the worst option. What sounds best to you?
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).