So how can this be done? What i mean is, When i build my main speakers, i want to have an 8", 6", 4" and a tweeter in each box. Now i know that i cant just run one wire to all the speakers and expect them to handle whatever frequencies are sent to them based upon there freq response. So i know i need some type of crossover. basically, i guess i need to know what kind of crossover i need to get to be able to split a signal 4 ways. my amp has L/R output response of 50 Hz – 20 kHz. now my sub will handle anything up to about 200Hz, and probably higher since i will also throw in 2x10" woofers in there at some point before i get my L/R built. (is this making sense? my sub will have one 12" doing 10Hz - 200Hz, and 2 10" doing from 200Hz - ???Hz) So i want my "mains" to handle what is being sent to it. but i also want these speakers to work with other units, not just mine. So, Im thinking that my 8" will handle what my 2x10" doesnt. Lets just say, everything from 400Hz - 800Hz (arguments sake only) then my 6" to cover 800Hz - 2000Hz, then my 4" to cover 2000Hz - 10000Hz, and my tweeters to handle 10000Hz - 20000Hz. (all of the above values are fictional and used only for trying to get my point across) So what would be the best way to do this and how should i setup my sub, and L/R to handle what frequencies?? My sub will be powered using a Rythmik Audio 380W plate amp. Not sure how i will power the 2x10" that i will put into later, but i will cross that bridge when i come to it. I'm mostly concerned about my L/R speakers and what frequencies each driver should cover and how to get it to cover that freq. range. so the 8" should handle ???Hz - ???Hz the 6" should handle ???Hz - ???Hz and so on and so forth. I hope this makes sense cause if i can get this sorted now, then i can start designing so that when i do get all the drivers for this, i can simply start building.