I always wondered about installing a power-ful stereo into an electric car. Reduce the range much?

Actually the Insight is a gas/electric hybrid, so it doesn't effect the range. The amp is an extra load on the DC/DC converter between the 144V and 12V systems (the electric motor charges the 144V battery pack, there is no alternator for the 12V system). However, from what I've read it shouldn't be a problem.
BTW I forgot to mention that the system sounds great!
-Jeff