Consult your ownerÂs manual to determine if the manufacture recommends shorting plugs. Some equipment requires XLR shorting plugs when using rca outputs, other do not.
Some people use XLR and RCA caps without shorting pins (Cardas Caps) which are purported to stop stray RFI/EMI from entering the equipment.
Some people use XLR and RCA caps without shorting pins (Cardas Caps) which are purported to stop stray RFI/EMI from entering the equipment.