I have an SVT (1981 MTI with Magnavox-era circuitry....12DW7 tubes...etc). A friend is loaning me his Mesa Boogie 2x15 Road Read cab. It's one of those 800w units that can also be connected as two separate 400w drivers. My question has to do with how to hook it up. The transformer has only 4 and 2 Ohm taps. The amp has two speaker jack connections on back. Somebody told me something confusing about the two connections being both connected to the 4 Ohm tap, or something like that. So....how do I hook this up without damaging anything? Two 4 Ohm speakers in parallel means 2 Ohms? In series means 8 Ohms? Connecting one 4 Ohm speaker to each connection.....means 2 Ohms? And I flip the switch to "2 Ohms"? And I turn all the volume knobs to "10?" Okay, I'm kidding about that last part.