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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.
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A839.1
B00.5
C00.31
D00.12
E00.4
F4x182.0
G02.11
H59.01
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 FrequencyFigure 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
USA 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043
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Hong Kong Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329
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Mexico Av. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: (52) 5358-5434, FAX: (52) 5358-5588
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: 44 181 640 9600, FAX: 44 181 646 7084
Africa, Mid-East 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7424, FAX: 952-887-9212
Latin America 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7491, FAX: 952-887-9212
www.electrovoice.com Telex Communications, Inc. www.telex.com