User manual ELECTRO-VOICE HP420 DATASHEET
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Manual abstract: user guide ELECTRO-VOICE HP420DATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] HP420
General Product Description
The Electro-Voice® model HP420 is a wide-range, flat-front, high-frequency, constant-directivity horn. [. . . ] The driver-mounting flange and initial throat section shall be constructed of 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. 94in. ) diameter and its flange shall be provided with four ¼-20 clearance bolt holes on a 10. 2 cm (4. 0 in. ) circle for the mounting of the compression driver. The horn shall be 36. 7 cm (14. 4 in. ) high, 61. 0 cm (24. 0 in. ) wide, and 74. 9 cm (29. 5 in. ) long. The horn shall be the Electro-Voice model HP420 constant-directivity horn.
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).
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:
40° (+20°, -10°) (-6 dB 650 Hz to 20 kHz)
20° (+10°, -10°) (-6 dB, 2. 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.
47. 5 (average 1. 25 kHz to 20 kHz)
Directivity Index Di:
DH1A or DH2A
16. 8 dB 10 log R, (average 1. 25 kHz to 20 kHz)
Lowest Recommended Crossover Frequency:
5. 9 kg (13. 0 lb)
Dimensions: A B C D E F G H
Inches 1. 94 5. 00 14. 45 24. 00 4. 00 0. 281 x 4 29. 50 29. 25
Figure 1: Dimensions
The axial directivity factor R (formerly Q) of the HP420 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. [. . . ] 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. [. . . ]
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