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Manual abstract: user guide ELECTRO-VOICE HP940 EDS
Detailed instructions for use are in the User's Guide.
[. . . ] HP940
General Product Description
The Electro-Voice® HP940 is a wide-range, flat-front, constant-directivity, high-frequency horn. [. . . ] The initial throat section shall be
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. 92 cm (1. 94-in. ) diameter, and its flange shall be provided with four clearance holes for 1/4-20 bolts, located on a 10. 2 cm (4. 0 in. ) circle for the mounting of the compression driver. The horn shall be 33. 0 cm (13. 0 in. ) high, 53. 3 cm (21. 0 in. ) wide and 28. 4 cm (11. 2 in. ) long. It shall weigh no more than 3. 2 kg (7. 0 lb). The horn shall be the Electro-Voice HP940 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:
90° (+20°, -10°) (-6 dB 500 Hz to 20 kHz)
Vertical Beamwidth:
40° (+20°, -10°) (-6 dB, 1. 2 kHz to 20 kHz)
Directivity Factor R (Q):
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:
11. 8 (average 1. 25 kHz to 16 kHz)
Directivity Index Di:
DH1A or DH2A
Weight:
10. 7 dB (+1. 2, -1. 3 dB) 10 log R, (average 1. 25 kHz to 16 kHz)
Lowest Recommended Crossover Frequency:
3. 2 kg (7. 0 lb)
500 Hz
Dimensions: A B C D E F G H
Inches 1. 938 5. 00 13. 00 21. 00 4. 00 0. 281 x 4 11. 20 10. 95
Figure 1: Dimensions
Directivity
Beamwidth
The axial directivity factor R, (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.
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. [. . . ] Specifications subject to change without notice. [. . . ]
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