On the official Greg Lake Website, I found a diagram of his modern bass rig. It had 1x15s on the bottom, 4x10s in the middle, and what are called "bright boxes" on top, and I think that these are some sort of compression drivers for the HF bright sound of his bass. I have a 1x18" Coliseum bass cabinet, and I was thinking of adding a 4x12 and some sort of PA horn (like a Coliseum large radial horn) on top, If I can find one (And a crossover, of course). Good idea, medium idea, or bad idea?