The problems we face
Sound reinforcement in public places requires uniform sound coverage throughout the venue, and no corner can be ignored. Uniformity is a very important technical indicator in engineering applications.
In order to solve the problem of sound field uniformity in engineering applications, the traditional sound system design is to build a complex speaker combination,Fill speakers scattered throughout the venue，Compensate the area that the main amplifier box cannot effectively cover in its service area by means of complementary frequency bands.
Usually, the models used for fill speakers are different from those of the main speakers, and their phase characteristics are different. The sounds they emit reach the listener's ears at different frequency bands at different times, and produce uneven cancellation at the listener's position. The offset produced by the position is different, forming a complex sound field with both superposition and offset. DSP digital processing technology is almost impossible to solve this problem. Therefore, the supplementary speaker can only play the role of equalizing the frequency response in a limited local area. But it has a very negative impact on the main sound field.
Filling speakers increases the equipment investment of the system, increases the complexity of the system, increases the difficulty and workload of system installation and debugging, and increases the work of system maintenance in the later stage. The biggest problem is that it deteriorates the sound and destroys the overall unity of the sound field.
Solution
The feature of horizontal constant directivity control is an important watershed between the new generation and the previous generation of speakers.
Hzaudio's constant directivity technology is applied to the line array system. Relying on the constant directivity coverage of the speaker itself, providing unprecedented directional control, the horizontal direction of the line array forms a uniform coverage of a wide frequency band without relying on the fill speaker, which simplifies the entire sound reinforcement system，It greatly simplifies the workload and difficulty of on-site system debugging.
LA-3 is a dual 10-inch three-way line array speaker designed for touring performances. It is based on the principles of the smallest volume, the lightest weight, the largest energy output, and the most effective sound projection.
Sound field contour map of LA-3
The whole frequency band of LA-3 from 200hz to the top is always constant at 80 degrees, which does not change with frequency changes. Even if it deviates to 45 degrees, it is still consistent with the positive axis frequency response and still maintains smooth phase characteristics.
Off-axis response graph of LA-3
Description
Contains two 3-inch voice coil, specially reinforced neodymium magnet high-power tapered 10-inch transducers, a horn-loaded low-distortion 8-inch neodymium midrange cone driver, and its diaphragm achieves a near-perfect pure piston over the entire operating frequency range Motion, two 3-inch voice-coil neodymium compression drivers, coupled to a high-pressure die-cast molded low-resonance high-density aluminum alloy cylindrical waveguide transducer for precise waveform control.
The mid-high frequency section is coaxial design to ensure precise and stable phase connection near the crossover point, The built-in crossover network with precise phase characteristics forms a horizontally symmetrical 80-degree constant-direction cylindrical radiation wave. Through a dedicated DSP control program, precise sound field coverage is achieved.
Application configuration
The vertical splay between the speakers can be adjusted between 0-12 degrees in increments of 1 degree. Specially designed for touring performances, the very simple, quick and convenient magnetic suction pinless hanging system avoids the risk of the pin being scratched off during transportation, and two people can easily and quickly complete the hanging work of the system.
The solid birch plywood box is sprayed with a waterproof, wear-resistant and impact-resistant polyurea coating on the surface, a strong perforated steel plate, and an acoustic sound-permeable sponge on the back to prevent dust and water droplets from splashing.
