I bought these to install in my Magnum but never used them. They are bi-ampable with a silk dome tweeter. These are awsome sounding speakers made in Italy. You can use them for rear fill or as a great co-ax in the front. They are very hard to find. Because of the high retail cost they are no longer imported to the U.S. I paid $175 plus shipping for them which I felt was a great deal. I will sell them for the same price. Price is firm. I don't mind breaking even but don't want to lose money. Here is a link to AD's web site: http://www.audiodevelopment.it/eng/car/car/cx/6cx.html
