2- Way passive crossover very flexible options make a BIG front system using only one 2 channel amplifier! possible combinations: – 1 pair of woofers and tweeters – 2 pairs of woofers and 1 pair of tweeters – 2 pairs of woofers and 2 pairs of tweeters see pictures for connections and jumper positions Especially designed to use with Ground Zero GZCK woofers and GZCT tweeters..