Electro-Voice Constant-Directivity Horn HP1240 user manual

Summary of the content on the page No. 1

HP1240
Constant-Directivity
Horn
General Product Description
®
The Electro-Voice model HP1240 is a wide-range,
flat-front, high-frequency, constant directivity horn. The
horizontal 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 HP1240 suitable for al

Summary of the content on the page No. 2

Ds imensions: Inche A8 1.93 B0 5.0 C0 13.0 D0 21.0 E0 4.0 F4 0.281 x G4 10.4 H9 10.1 Figure 1: Dimensions Directivity Beamwidth The axial directivity factor R (formerly Q) of the HP1240 horn A plot of the HP1240’s 6-dB-down total included beamwidth θ was computed at each one-third-octave center frequency from angle is shown in Figure 3 for each one-third-octave center the horizontal/vertical polars. The graph in Figure 2 illustrates frequency. The horizontal beamwidth is maintained at 120° th