I've read all I can, yet still feel ignorant--I have an Ampeg cab with 2 jacks--says "stereo" on the back by the jacks , and each jack is rated @ 8 ohms. On my Mark IV combo, I have 2 - 4 ohm jacks and 1 -8 ohm jack. Question: to connect the Ampeg cab, what are my choices, and what would sound...