Electro-Voice Constant-Directivity Horn HP66 User manual

HP66
TransPlanar™
Constant-Directivity
Horn
General Product Description
The Electro-Voice®HP66 is a wide-range, flat-front,
constant-directivity, high-frequency horn. With the
HP66, a horizontal dispersion angle is controlled over
a frequency range of 1.6 kHz to 20 kHz, and the vertical
angle is controlled from 1.25 kHz to 20 kHz, both with
unusual precision and adherence to the intended angle.
Furthermore, excellent loading is maintained to a low
frequency of 1000 Hz.
The flat-front TransPlanar™ design makes the HP66
suitable for all modern boxed and clustered systems. A
special vaned waveguide throat detail gives the HP66
unusually uniform vertical directivity control in the top
octaves when compared to similar 2-inch-throat horn
designs.
Architects’ and Engineers’ Specifications
The horn shall be of the constant-directivity type.It shall
produce a horizontal beamwidth (6-dB-down angle) of
60 degrees, deviating no more than 20 degrees from
this angle over the frequency range of 1,600 to 20,000
Hz. It shall produce a vertical beamwidth of 60 degrees,
deviating no more than 20 degrees from this angle over
the frequency range of 1,250 to 20,000 Hz. In addition,
it shall provide useful acoustic loading at all frequencies
above 1000 Hz.
The horn shall be of hybrid fiberglass-and-zinc
construction. The initial throat section shall be
Specifications:
The following specifications are in accordance with or
exceed the AES Recommended Practice for
Specification of Loudspeaker Components Used in
Professional Audio and Sound Reinforcement
(AES2-1984; ANSI S4.26-1984).
Horizontal Beamwidth:
60° (+20°, -10°) (-6 dB 1.6 kHz to 20 kHz)
Vertical Beamwidth:
40° (+20°, -10°) (-6 dB, 1.25 kHz to 20 kHz)
Directivity Factor Rθ(Q):
17.8 (average 1.6 kHz to 20 kHz)
Directivity Index Di:
12.5 dB (+2.0, -3.0 dB)
10 log Rθ, (average 1.6 kHz to 20 kHz)
Lowest Recommended Crossover Frequency:
1000 Hz
constructed on die-cast zinc and shall be integrally
laminated into the fiberglass portion of the horn.
The horn shall possess a throat of 4.93-cm (1.94-in.)
diameter, and its flange shall be provided with four
clearance holes for ¼-20 bolts, located on a 10.2-cm
(4.0-in.) circle for the mounting of the compression
driver. The horn shall be 27.9 cm (11.0 in.) high, 22.4
cm (8.8 in.) wide and 16.5 cm (6.5 in.) long. It shall
weigh no more than 2.2 kg (4.8 lb).
The horn shall be the Electro-Voice HP66
constant-directivity horn.
Construction:
Polyester resin and glass-fiber laminate integrally
molded to a die-cast zinc throat section. This hybrid
construction assures a rigid driver mount, accurate,
loss-free throat-wave transmission and low total weight
compared to horns of similar size.
Mechanical Connection of Driver:
Bolt on; standard 2" diameter throat, 5" diameter
mounting flange and four clearance holes for ¼" bolts
on a 4" diameter bolt circle.
Recommended Driver:
DH1A, DH2A, DH2As2
Weight:
2.2 kg (4.8 lb)

U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392 3497 Fax: [phone]
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.
:snoisnemiDsehcnI
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 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Canada 705 Progress Avenue, Unit 46,Scarborough, Ontario, Cana a, M1H2X1,Phone: [phone], FAX: [phone]
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], FAX: [phone]
France Parc e Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], FAX: [phone]
Australia Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: [phone], FAX: [phone]
Hong Kong Unit E & F, 21/F, Luk Hop In ustrial Bl g., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], FAX: [phone]
Japan 5-3-8 Funabashi, Setagaya-ku, Tokyo, 156-0055 Japan, Phone: [phone], FAX: [phone]
Singapore 3015A Ubi R 1, 05-10, Kampong Ubi In ustrial Estate, Singapore 408705, Phone: [phone], FAX: [phone]
Mexico Av. Parque Chapultepec #66-201, Col. EI. Parque E o. Mex. 53390, Phone: [phone], FAX: [phone]
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], FAX: [phone]
Africa, Mid East 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Latin America 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
www.electrovoice.com  Telex Communications, Inc.  www.telex.com