I just have to put in an unsolicited plug for Dave at Avatar Speakers. He is tops in customer service and standing behind his product well after the sale. It is refreshing to deal with someone who understands this. I had purchased a B410 Kappa Pro last spring and only now realized it had a bad crossover. Dave sent me a new one that arrived within three days. No questions asked, No hassles, No charge! He has earned my support for life. Thanks Dave!