i believe that if you do it the most simple way (the equivalent of a Y cable) the inputs will interact with each other, lowering the volume in one will affect the other.
i believe that if you do it the most simple way (the equivalent of a Y cable) the inputs will interact with each other, lowering the volume in one will affect the other.
Tried doing that once before with a friends amp and the volume of each guitar would phase in and out. Was quite annoying as he only had one amp at his house but kind of funny.