Hi all, I am assembling a stereo from speakers that i have here around the house for college. I have two KLH 970As as the front L and R. I have a rather large speaker 10" speaker i have posted about previously I plan on using as a subwoofer. I plan on using a standard radio receiver and these speakers; however, my reciever is too old to have a dedicated sub channel. I was looking at building a crossover for this to put in line with the front speakers to send the low frequencies to the sub. Do you guys and gals know of any good websites where i can learn how to build one of these? or is there a website that sells them?