I recently bought an Ampeg BA-210 V2 (used). I've been looking for a second (Ampeg, 8 ohm) cab to add to it and I have come to the conclusion my best bet might be to "slave" a second BA-210. If one breaks I still have the other. My question is, what would be the best way to connect these two combos together? Using an instrument cable(?) go from "send" on one to "return" of the other? Would the amp in the second cab come into play or does the second cab just become a passive slave to the first? These combos are 283W standalone (8 ohm), 450W when adding an 8 ohm cab (4 ohm). Thanks in advance !!!!