Asymmetrical Horn Configuration - Nexo PS Série Manuel D'utilisation

P.8
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corresponding TDcontroller channel should light up accordingly. This will help to locate wiring errors,
particularly Left to Right or LF to HF Sense line channel inversions which would disable the TDcontroller
protection circuits and may invalidate the warranty.

Asymmetrical Horn Configuration

Principle
The Asymmetrical Dispersion Constant Directivity horn is an important feature of the PS Series. This
concept was previously only available for highly specialized applications; in the general purpose PS it is
fully exploited thanks to a practical design that makes user configuration of the horn practical and quick.
The proper configurations of the horn for two common applications are shown below. All 4 positions of
the horn are possible and can be useful for specialized applications such as complex arrays, systems
designed with CAD software and stage monitoring.
The specific dispersion of the PS8, PS10 & PS15 horn can be seen on figure 1 ("front of house"
configuration):
As seen on the side view, vertical coverage is narrower above horn axis (+25°) than below (-30°).
As seen on the front view, horizontal coverage is narrower above horn axis (50° Horizontal for +25°
Vertical) and wider below (100° Horizontal for -30° Vertical). Between these two extremes horizontal
coverage varies according to a specific law; on axis (0° Vertical) coverage is 75° Horizontal.
Access to the horn for configuration and checking is easily made by removing the front grille (pull gently
the sides of the grille to disconnect the press-stud fixings). To modify horn orientation, remove the four
Allen 4 metric or TORX TX25 screws (depending of model and age of the cabinet) that hold the horn in
place. A sticker on the wide dispersion side of the horn shows the correct orientation for wedge
monitoring and front of house applications: you simply position the indication on the desired side. The
arrow indicates the wide dispersion.
« Front of house » Configuration
Good coverage of audiences often requires a
conflicting combination of wide coverage ("short-
throw") for the closest listeners (below cabinet axis)
and narrow coverage ("long-throw") for distant areas
(on or above axis). The PS Series horizontal horn
coverage varies from "short-throw" to "long-throw"
along the vertical axis to precisely match these
practical requirements in a single system. For the
majority of applications, the asymmetrical horn
should be used with its "wide" dispersion side
directed towards the floor (as shown by the arrow) but all four cabinet orientations are usable.
PS SERIES MANUAL REV3 10/10/05
LOUDSPEAKERS
50˚
100˚
+25˚
-30˚