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Manual abstract: user guide ELECTRO-VOICE HPT64 EDS
Detailed instructions for use are in the User's Guide.
[. . . ] HPT64
Constant-Directivity Supertweeter Horn
General Product Description
The Electro-Voice® model HPT64 is a wide-range, flatfront, constant-directivity super-tweeter horn. [. . . ] The horn shall possess a throat of 2. 36 cm (0. 93in. ) diameter and shall be provided with a 1-3/8"-18 threaded hole for the mounting of a compression driver. The horn shall be 13. 3 cm (5. 3 in. ) high, 13. 3 cm (5. 3 in. ) wide, and 10. 4 cm (4. 1 in. ) long. It shall weigh no more than 1. 8 kg (4. 0 lb). The horn shall be the Electro-Voice model HPT64 constant-directivity horn.
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: 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:
60° (+20°, -10°) - (-6 dB 3 kHz to 20 kHz)
Vertical Beamwidth:
40° (+20°, -10°) - (-6 dB, 4 kHz to 20 kHz)
Directivity Factor R (Q):
1-3/8"-18 thread allows the attachment of the DH2010A or DH2T drivers
Recommended Driver:
15. 8 (average 3 kHz to 20 kHz)
Directivity Index Di:
DH2010A or DH2T
Weight:
12. 0 dB (+1. 2, -1. 6 dB) 10 log R, (average 3 kHz to 20 kHz)
Lowest Recommended Crossover Frequency:
1. 8 kg (4. 0 lb)
1. 6 kHz
Dimensions: A B C D E
Inches 1 3/8 - 18 4. 13 5. 25 5. 25 0. 17" x 8
Figure 1: Dimensions
Directivity
Beamwidth
The axial directivity factor R. (formerly Q) of the HPT64 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 3 kHz to 20 kHz. The axial frequency response of the HPT64 horn with a particular driver is in close correspondence to that driver's power response above 3 kHz.
A plot of the HPT64's 6-dB-down total included beamwidth angle is shown in Figure 3 for each one-third-octave center frequency. [. . . ] Specifications subject to change without notice. [. . . ]
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