Check out the thread titled "Kelton Bassworks Sub" in the Audio/Video section of this forum. Basically, you can get the aftermarked Kelton subwoofer that is designed for the 99-02 Odysseys. That's what I will get for my 02 Ody. I don't think Honda offers a subwoofer. Sounds like the Pioneer 1695's will also be a good upgrade for the speakers in the 02's.