Hello everyone. I have a Koch Studiotone with 4, 8 and 16 ohm outputs. I want to connect this to my Brunetti cab. It has 2x12 inch speakers of 16 ohms each. If I use the 8ohm output of my Koch amplifier and I plug that speaker cable into the mono input of 8ohm, it only works with 1 speaker. What's wrong here?