Logitech Z-5500 Subwoofer dimensions

I've just ordered a Logitech Z-5500 sound system for one of my clients, and they need to build a custom enclosure for the subwoofer. Unfortunately, Logitech does not list the outside dimensions of the subwoofer anywhere that I can find on their site. If one of our friendly forum members who have this system could reply with the outside dimensions of the subwoofer (LxWxH) I'd be ever so very grateful...

OK, never mind, kiddies, found it at **Cough** Tom's Hardware Guide **Cough** See? That site's actually good for something...