General Product Description

The Electro-Voice®HP640 is a wide-range, flat-front, constant-directivity, high-frequency horn. With the HP640, a horizontal dispersion angle is controlled over a frequency range of 500 Hz to 20 kHz, and the vertical angle is controlled from 1.5 kHz to 20 kHz, both with unusual precision and adherence to the intended angle. Furthermore, excellent loading is maintained to a low frequency of 500 Hz.

The flat-front design makes the HP640 suitable for all modern boxed and clustered systems. A special vaned waveguide throat detail gives the HP640 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 500 to 20,000 Hz. It shall produce a vertical beamwidth of 40 degrees, deviating no more than 10 degrees from this angle over the frequency range of 1,500 to 20,000 Hz. In addition, it shall provide useful acoustic loading at all frequencies above 500 Hz.

The horn shall be of hybrid fiberglass-and-zinc construction. The initial throat section shall be

HP640

Constant-Directivity

Horn

constructed on die-cast zinc and shall be integrally laminated into the fiberglass portion of the horn.

The horn shall possess a throat of 4.9 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 33.0 cm (13.0 in.) high, 71.1 cm (28.0 in.) wide and 43.7 cm (17.2 in.) long. It shall weigh no more than 4.3 kg (9.5 lb).

The horn shall be the Electro-Voice HP640 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:

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:

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:

4.3 kg (9.5 lb)

500 Hz

HP640 specifications

The Electro-Voice HP640 is a high-performance loudspeaker designed to meet the demanding standards of both professional and semi-professional audio environments. This powerful speaker is renowned for its advanced engineering, innovative technologies, and exceptional sound quality, making it a popular choice for concert venues, event spaces, and mobile sound reinforcement.

One of the main features of the HP640 is its impressive power handling capability. With a continuous power rating of 300 watts and a peak handling of up to 1200 watts, this speaker can easily handle high sound pressure levels without compromising audio clarity or distortion. The high-efficiency design allows for maximum output, ensuring that every note and beat is reproduced with precision and depth.

The HP640 utilizes a custom-designed 6.5-inch woofer that provides deep bass response and an expansive frequency range. This woofer is paired with a 1-inch titanium-dome compression driver, which ensures crisp, clear high frequencies. The combination of these drivers allows the HP640 to deliver a frequency response of 60 Hz to 20 kHz, making it suitable for a variety of musical genres and audio applications.

Another notable technology incorporated into the HP640 is the Waveguide Control. This feature ensures uniform coverage across a wide listening area, reducing the typical drop-off in sound quality experienced at the edges of the listening field. The waveguide design optimizes high-frequency dispersion, allowing for clear vocal reproduction and detailed sound even at significant distances from the speaker.

Additionally, the HP640 is built with durable components and materials, making it road-ready for touring applications. The robust cabinet construction minimizes vibration and resonance, while the powder-coated steel grille offers protection for the drivers. Whether mounted on stands or used in a stacked configuration, the HP640’s design promotes stability and reliability in various performance situations.

Portability is another key aspect of the HP640. Weighing in at a manageable size, it is easy to transport, making it an ideal choice for mobile DJs and event production companies. With user-friendly connection options, including XLR and 1/4-inch inputs, the HP640 can be easily integrated into existing audio systems.

In conclusion, the Electro-Voice HP640 stands out as a versatile, high-performance loudspeaker that combines powerful sound output with advanced audio technologies. Its robust design, exceptional sound quality, and ease of use make it an excellent choice for professionals seeking reliable performance in any setting.