'HP' is an abbreviation of hyperbolic paraboloid which is normally called an 'HP shell' or hyper shell, and is a 3rd-order curved surface structure. This structural theory has long been well known in the field of the structural mechanics.
The Orchestra house in Sydney, Australia, a good example to which the HP structure is applied, is famed world-wide for its beautiful form.
The HP structure is characterized primarily by the fact that movement of a line connecting 2 line segments which exist on different surfaces results in composition of a hyperboloid and paraboloid.
The FW168HP is the worlds first application of HP structure to the hi-fi component.
Now, Qts value modified version FW168HP-X (Qts:0.53) is also available.