How much of an improvement would the Bass optimizer have on a TN1220HO run by a non-Hsu amplifier. Hsu also mentions that the box can be configured as a hi pass filter but seems like you lose the bass optimizer feature. It would really be nice if I could use it as bass enhance or hi pass filter - can one be easily modified by changing a few internal components? Has anyone used it as a hi pass for their mains and can comment on it's performance. What powers this box anyway?