I'm using an HA7000 with a 1-15" cab and a 2-10" cab with a tweeter. both hartke cabs. I've been using the biamp function, but now rethinking that idea. Wondering what others are doing in this situation.If I couid overlap some freq. it would b good, but at the crossover point I select, the lower freq. goes to the fifteen, and the higher goes to the tens, which sounds fine, but the fifteen is missing out on so much more it can do and so are the tens. I think that crossover would b more suitable for just a tweeter array or something like that. Would like to hear from others on this, thank you