Cordial greetings, friend Daniel, professional audio systems is a very complex and even a bit complicated issue because it needs several resources for optimization and there are several ways to put it together, in general for a true professional audio system, it must be armed separately, that is to say an amplifier for bass, one for the media and the other for the brightness independently, thus greater clarity and performance are chosen, but in your case friend, you have a fundamental piece and it is the active Crossover that They said that it is three-way, low, medium and brightness, and has speakers or boxes for bass, you can use these elements to begin with, and help yourself with a good amp that delivers about 500 to 600 watts of power with an impedance configurable from 8 ohms to 4 or 2 ohms so you can do what you want, this amplifier must be stereo to take advantage of both channels. In one channel you can place the two boxes for the basses together, which in parallel would be 4 ohms and their wattage would be 400 wats, in the other available channel of the amplifier it would be for tweeter means brightness, this is where the crossover takes importance which is for this purpose, not only for the brightness, since this device has the different frequency outputs for this purpose, the output for bass, the output for media and the output for brightness respectively, as for the twweters can be 8 ohms from about 300 to 400 watts, and with the diameter of your coil about 1.5 to 2 "to take medium and high frequencies, or it may also be that you place speakers for media only, if you use the crossover to This should square the frequencies for each speaker, both the bass, medium and brightness, to work well. The second mode is that of Full Range or in Spanish all range, in which the three speakers, low, medium and brightness are all in the same box, but each of them must be protected respectively, since they operate at different frequencies and they do not support the same power all, I would advise him since he has the crossover that he was given, do it separately and add a graphic equalizer for greater frequency coverage and good speakers for the media such as about 8 "to 8 ohms , and 300 to 500 wats, of course accompanied by some good tweeters as I mentioned earlier, I hope friend that with this explanation clear your doubts, in any case do not stop commenting if any concerns.