I purchased a set of Diamond Audio D661a speakers from woofers.ect recently. I used to own the M561 series and the D661 are 2 generations newer. The new basket was too bulky to fit in the door where the old ones had been without some serious modification that I wanted to avoid. I called them up told them my problem and that I wanted to exchange them and they were very willing to take of me. They sent my new speakers out the day after they received my return and I should have them tomorrow or Thursday. I was impressed with the promptness of their service. They have really low prices and the customer service seems to be great. I would keep them at the top of my list.