I'm going to be building a pair of speakers with Adire Extremis 6" mid woofers and a tweeter based on Adire's plans (ETA unknown on the plans). I am thinking of actively biamping these. Is there a good not too expensive method for active bi-amping? I was looking at a Behringer Ultradrive Pro DCX2496 for the crossover functions, but then I need 4 channels of amplification and a volume control. Or, is it not worth biamping with all solid state components and I should just use a passive crossover and a 2 channel amp?