I use to own a HP200. The HP200i was an update to the HP200. The most notable differences was a redesign of the power supply, AC to DC tube filament supply and changes to some passive parts. The HP200i was launched in 2009 and shortly thereafter, Hovland closed their doors and that is why there are not too many 200i in existance. I never seen or heard a HP200i and my dealer which I bought my HP200 never got any stock.