Electro-Voice Constant-Directivity Horn HP940 - Manual (Page 2)

U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392-3497 Fax: 800/955-6831
For warranty repair or service information, contact the Service
Repair department at 800/685-2606
For technical assistance, contact Technical Support at 866/78AUDIO
Please refer to the Engineering Data Sheet for warranty information.
Specifications subject to change without notice.
: s n o i s n e m i D s e h c n I
A 8 3 9 . 1
B 0 0 . 5
C 0 0 . 3 1
D 0 0 . 1 2
E 0 0 . 4
F 4 x 1 8 2 . 0
G 0 2 . 1 1
H 5 9 . 0 1
Directivity
The axial directivity factor R
θ
, (formerly Q) of the HP940 horn
was computed at each one-third-octave center frequency from
the horizontal/vertical polars. The graph in Figure 2 illustrates
this data over the range 500 Hz to 20 kHz. The axial frequency
response of the HP940 with a particular driver is in close
correspondence to that driver’s power response above 500
Hz.
Figure 3: 6-dB-Down Beamwidth versus Frequency Figure 2: Directivity vesus Frequency
Figure 1: Dimensions
Beamwidth
A plot of the HP940’s 6-dB-down total included beamwidth
angle is shown in Figure 3 for each one-third-octave center
frequency. The horizontal beamwidth is maintained at 90°
(+20°, -10°) over the range 500 Hz to 20 kHz. Vertical
beamwidth control occurs only above 1.2 kHz because of
the relatively short vertical dimension of the horn’s mouth.
© Telex Communications, Inc. 02/2001
Part Number 38109-963 Rev A
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