We got our bass player a 4 x10 ampeg cab with blown speakers and ordered 4 x 10" new Eminence drivers for the puppy and it should rock! I know how to wire in series and I know how to wire in series-parallel. However, for the life of me, I cannot visualize how to put a switch in there to easily switch between the 2! I have an old low-profile DPDT switch from an ampeg 4x12 that I cannibalized that I can use (should be able to handle the voltage I would think). I've looked and looked for a diagram and found squat. Is this doable? Thanks!