Greetings, I have a regular stack guitar amp and I accidentally plugged my multi effect unit's output into my amp's send instead of the return. However, I was able to still hear some guitar sounds, although not very clear. I only discovered later that it was plugged incorrectly. My question is why was I able to hear my guitar signal given that it was initially plugged into the send? Isn't the send an output signal path? Also, could this cause any damage to either my amp or guitar? I am not knowledgeable in the circuitry of this type of gear in general, so I appreciate any advice or feedback! Thanks a lot!