I also purchased the infinity Basslink, I loved it for my car and it was real easy since the amp was bulit in and had a bass remote with it. I purchased it off of a store on E-bay and I ended up getting one (brand new with waranty) for about $199.00. I am not sure about installing it in my X however, I like being able to put my back seats down and sleeping in the back, I think the basslink will get in the way of the air mattress?