Mosh

hi, so you want to built a 3 way system with active crossover, that means, you separate the frequencies before the amps? well it is the best way but the more expensive, you need to have 3 diferent amps per side, in my work we generaly use k3900 (3900w RMS) for bass, k2400(2400w rms) for mids, all class H, and a k1200 for the hi (class ab) all in bridge mode, for claculating the powers u need check your speakers and see what is the rms power of them, example: 300w rms LF driver i will put a 300w amp, and so on... regards