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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
C57.8
D00.11
E00.4
F4x182.0
G25.6
H33.6
Directivity
The directional characteristics of the HP66 were measured
in Electro-Voice’s large anechoic chamber using a stock
Electro-Voice® DH1A. The test signal was one-third-octave
filtered pink-noise at the frequencies indicated. A full spherical
measurement system was used. All directional information
was measured at 6.1 meters (20 feet) from the horn.
Figure 3: 6-dB-Down Beamwidth versus Frequency
This shows the horizontal and vertical beamwidths. Beamwidth is the
angle at which the horizontal and vertical polar responses have
decreased in level by 6 dB when compared with the axial frequency
Figure 2: Directivity vesus Frequency
This illustrates the total directivity of the HP66. The directivity factor R
θ
(Q) is the relative value at a point of the HP66 when compared to an
ideal spherical response. The directivity index Di is calculated by
D
i
=10log
10
R
θ.
Figure 1: Dimensions
© Telex Communications, Inc. 02/2001
Part Number 38109-958 Rev A
USA 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043
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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
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