DSP1500 Series Phased Array Column Speaker for Indoors
I. Product Overview
The weaknesses of the traditional phased array column speaker on the market are as follows:
1. For better sound directivity, the diameter of the speaker is supposed to be smaller (usually 3"), but at this time the sound quality will be poor. Therefore, we should strike a balance among the diameter, sound directivity, and sound quality.
3. The traditional phased array column speaker has the problems of high engineering cost, poor sound diffusion, and audio delay.
In response to the weaknesses as mentioned above, DSPPA designs and develops a phase array column speaker DSP1500, which can solve the related problems completely. It has the following advantages:
to design music mode (regular music playback) and hall mode (sound directivity) for a better balance among the diameter, sound directivity and sound quality.
3. DSP1500 adopts an innovative box design with one main and one sub speaker so that the sound quality of the sub speaker is the same as that of the main speaker. In addition, the design of the sub speaker makes the budget cost of customers greatly reduce and makes a better sound diffusion.
and can be used in conjunction with the dedicated passive speaker DSP1500L and the dedicated subwoofer DSP1500SThe column speaker is made of aluminum alloy speaker box, composed of 8 high-quality 4-inch full-range speakers, driven by a built-in 8-channel amplifier, with balanced input and 70v signal input. The directivity (vertical radiation angle) of the column speaker can be flexibly adjusted on the dedicated Web control interface.With the excellent built-in digital equalizer and phased beam adjustment algorithm, the directivity of the column speaker can be adjusted accurately and the sound quality can be improved effectively. (As shown below)
With excellent directivity, DSP1500 can adjust the directivity in three directions at the same time to ensure audiences in different directions can get an excellent listening experience. The traditional column speaker is slim in outlook. Multiple speakers are used together for high sensitivity, good intelligibility and easy installation, often used in speech amplification. However, they are often installed above the head of audiences. The high-frequency sound of the traditional column speaker cannot be effectively transmitted to the audience area due to the horizontal directivity, and good intelligibility cannot be obtained due to the long reverberation time in places such as waiting rooms and churches.
So, how does it achieve controllable directivity? After the column speaker is connected to a PC, it can generate the upward/downward tilted radiation directivity to cover the audience area based on the installation vertical height, listening distance and listening area, as well as the speaker distance and default dataWith controllable directivity, DSP1500 can emit the sound downward to the specified direction uniformly, greatly reduce the upward emission of sound and attenuate the acoustic reflection of the ceiling, as well as adjust the directivity in three directions at the same time to ensure audiences in different directions can get an excellent listening experience when it is installed vertically. (As shown in the figure on the left below)
Short overview of digital signal processing (DSP): DSP uses digital signal processing technology to convert and analyze signals such as audio, video, voice, light, temperature, pressure or position, and then output data available.
DDC is a multi-channel loudspeaker array technology where the single loudspeaker element is positioned in space according to a patented algorithm. This Phased Control Technology optimizes the shape of the far field main lobe, and enables users to electronically manipulate the vertical sound diffusion of a DSP1500 array speaker.
Speech intelligibility is in the top priority in all indexes requirement for sound reinforcement system desgin of auditorium and stadium. The designer should take into account the reverberation casued by the architectural layout of the auditorium and the sound reinforcement system. Therefore, how to deal with the relationship between the reverberation time and the sound reinforcement system will have some direct impact on the listening experience of the audience.
In response to this problem and other digital audio processing technologies, to adjust various parameters on the web control interface with a PC/tablet/mobile phone on the spot, such as adjusting the Q value of the column speaker to control the coverage area of the sound beam, effectively reducing the loss of consonant intelligibility.
Throught the control interface, you can control the vertical directivity to aim the sound at the required position. The speaker can support 2 channels of audio inputs, one of which can be divided into 2-band sound beams, and combined with the other channel to output 3-band sound beams at the same time. The directivity, distance, volume decibel, and EQ value of each band of sound beam can be directly adjusted on the web interface through a PC and mobile phone. In this way, we can adjust the volume decibel of the downward directed sound beam to a higher value, and adjust the volume decibel of the upward directed sound beam to a smaller value. When the upward volume decibel is at a small value, part of sound will be reflected from the wall and ceiling, thereby further reducing the volume and the impact of reverberation in the auditorium for an optimal sound reinforcement in the auditorium.
For example, as a foreign church with large spaceDistribution of Speakers Used in Churches
In various sound reinforcement occasions, the column speaker is required to install vertically against the wall or column without tilting, well-matched with the environment. The sound beam radiation direction can be freely changed on the Web control interface through a PC/tablet to cover the audience area directly. Also, it can adjust the built-in EQ (frequency equalization) function of the phased array column speaker for an optimal transmission frequency characteristics with feedback suppression and high sound transmission gain for sound reinforcement of the auditorium. And it has a built-in high efficient digital amplifier. When it is in use, only the program source is required, without complicated audio peripheral equipment.
VII. Functional Structure
DSP1500 3-brand Phased Array Speaker
DSP1500
● The passive column speaker is composed of 8 built-in 4” full-range speaker units, with 25W for each drive unit, and 200W for the total power.
DSP1500L can be used as a traditional column speaker with a “4Ω adapter cable”, equivalent to serve as a 4Ω column speaker; and can be used as a phased array column speaker when connected to DSP1500 phased array column speaker with a “D5M connecting cable”.
DSP1500S Subwoofer
The general column speakers or other speakers are insufficient in low frequency. In order to make up for their shortcomings, we have developed DSP1500S low-frequency speaker, which can be compatible with other column speakers to effectively compensate for the low-frequency components of the sound and improve the sound quality.
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