Instead of selling my SACD and my DVD-A players and buying a combined SACD/DVD-A player, is it dangerous to hook both players to my AVR's multi-channel jacks using y adapters?

Has anyone done this?

What happens if both players are accidentally playing?

How does the signal out from either player affect the other player because the signal is going into the other's output jacks?

What else could happen?

(I could use switch boxes but the cable cost would not be worth it. Both players are very good qualty)

Thank you,

Intune