subwoofer help

anybody out there installed a subwoofer on their xj? Is it easy to do, quadratec have a built in sub on the rt side? any suggestion on putting the amp on the sub so the storage space is not affected?

thanks

I just recently installed some subs in my 89 and it was real easy. i custom built a box becuase i needed a lil more bump than just a single 8 in. which is all that quad. can do. You could always just attach the amp to the back of ur seat which makes for easy access and doesn't take much room.