Hi I have pimp my odyssey 2004 exl with alpine ida x305s and replaced the front speakers with polk db651 (the front speakers now are at the back like many ody's owner have done). This was a major improvement and a amazing one for all the new technology it brings. Now I have purchase on ebay the kelton subwoofer and ordered from bernadiparts the adaptor. Since I have a modern radio now any of you might have a suggestion on how to connect the subwoofer to my radio? I am not attempting to perform this installation until I understand that connection better.