If i were to buy a Hartke 3500 and say an ampeg cab. Could i bu an avatar 2x10 or 1x15 and make the 1/2stack a full stack by useing both cabs. Or is hooking two cabs up to a 3500 not possible. Also got anything bad/good to say about a.) Hartke 3500 b.)Hartke 4000 or c.) Avatar Cab's ?