I was given a Behringer Ultrabass BX4410A today at work. The dude is going through a divorce and needed some cash. I only gave him 20 for it. It is the 4 x 10 combo 450 watts. I know I can ad another 4 x 10 and make it a 8 x x10. Would I be able to run a diffrent head if I wanted to? Or connect a power amp to that head? I already have an other 8 x 10 cab and want to find a way to incorporate both cabs once i get another 4 x 10