NHT L5 - Manual (Page 6)

! What is "Virtual" Focused Image Geometry?
NHT's hallmark for many years was technology called Focused Image Geometry (F.I.G.). This is achieved by angling the
front baffle of the loudspeaker cabinet. The angled cabinet focused the mid-range and high frequencies into the listening
room and away from room boundaries increasing the ratio of direct to reflected sound. This resulted in loudspeakers systems univer-
sally praised for their imaging and detail over a wide listening area.
Evolution incorporates a "virtual" adaptation of F.I.G. Rather than an angled cabinet, we increase the energy at the listening position
using the crossover and driver orientation.
When Evolution monitors are oriented vertically and the tweeter is closest the inside edge of the cabinet, the null created, at the
crossover frequency between the mid and high frequency drivers is directed at the sidewalls. The graph below shows the decrease in
energy, aimed towards the wall (C) compared to the direct sound radiating at listening area (A & B). The reduction in reflected sound
improves detail and provides a more 3-dimensional soundstage.
When oriented horizontally, the null is directed at the ceiling or floor (depending on tweeter orientation) improving mid-range detail.
C A
B B
A C