If you have 2, 3, 8, 57, etc. drivers on a particular channel, how do you make sure they all match each other's output levels? I'm talking about an active system with one amp channel per driver, or at least one channel per crossover band. Do you size the amps to match the different driver sensitivities? Or do you just size the amps to handle the biggest load and then turn down the gain on the more sensitive drivers? I know you don't need the same power on a 1" compression driver as you need on an 18" sub. I'm just curious as to whether there's a standard sort of method for figuring out how much power you do need for each driver. Seems like a waste to build/buy a 200W amp for a driver only to find out I need to turn the gain down to 98W to get the SPL to match the rest of the system.