okay, i got my new 18" speaker to throw under my 2 10s and i cant quite figure out the crossover. i plug the 18 into the low out and the 210 into the high out. i get barely any sound and its coming from the 210. so little of a sound that i can only hear it when i am up against the speaker. it sounds like the only power i am getting is from my 18 volt electronics. am i missing something? is there a button i need to push somewhere? thanks for any help.