I recently purchased a Silver DX that came with a dealer-installed stereo that utilizes only four speakers. (There is a storage compartmnet where the subwoofer sits in the EX.) This was not a problem since I don't generally like the sound of honda stereos and plan to upgrade in the future. I am a bit of a novice at this, and have what will probably seem like a dumb question: When I do decide on a new receiver, how can I go about adding a subwoofer. Does that storage compartment remove? Will the installation of the subwoofer be fairly easy?