- Time：2023/9/19 Posted：Guangzhou Lanjie Yinshi Electronic Technology Co., Ltd
Project Overview:
The marketing service center of State Grid Gansu Electric Power Company needs to achieve audio transmission throughout the service center, achieving uniform coverage of sound pressure, clear and full sound quality, no whistling, and clear levels of high and low frequencies throughout the entire venue. The speaker unit adopts a beautiful and atmospheric coaxial adjustable angle ceiling speaker, with a 360 degree head shaking design around it, which can point to sound weak areas. The equipped partition explanation system can achieve the purpose of telling where to go and playing quickly. The entire service center is divided into 6 major areas, with a mobile speaker for where to sound and a mobile wireless microphone for full playback and paging. This system can be used for classified explanations, full audience sound reinforcement, daily activities, etc. in terms of functionality< Br/> Sound reinforcement system:
1) Speaker design:
The service center speakers are 14 KB-029B coaxial adjustable angle ceiling speakers with a power of 80W. Specification of this speaker unit: 8“ × 1+1“ × 1. It is very suitable for sound compensation in conference rooms and large venues. The unit is made of high-end aerospace magnetic steel, with adjustable angles for high pitched sound by shaking the head towards the surrounding area. It features a full paper basin edge configuration, prominent mid frequency vocals, and conforms to the speech characteristics of the conference room. The ceiling has openings: Φ 250mm, installation form: ceiling mounted< Br/> 2) Amplifier design:
The power amplifier is strictly designed according to the speaker power and loss. The speaker power amplifier uses 6 KB-FP0300 professional amplifiers, with a maximum output of (2 Ω): 800W × 2. Far surpassing similar standards, it is a standard accessory for entertainment grade speakers. It can provide high-quality power signals for a long time and stably, with automatic protection, low heat generation, and minimal noise. The internal components use imported components, which have high fidelity amplification, restoring the music scene and reproducing pure music emotions. A comprehensive electronic protection route with functions such as soft start, overload protection, short circuit protection, self-excitation protection, overheating protection, switch mute, DC DC protection, etc., ensuring safety and reliability< Br/> 3) Processor design:
The most important part of the sound reinforcement system uses a 16 × A 16 channel digital audio processor. 16 balanced microphone/line inputs, with 48V phantom powered soft switch, 0, 6, 30, 36, 42dB multi-level gain adjustment. Equipped with a built-in Dante network transmission module, it can achieve low latency and high fidelity audio signal transmission with high broadband network support. Built in Adaptive Feedback Cancellation (AFC) with 16 suppression points, supporting three working modes: manual, fixed, and dynamic. Support 8 sets of scene preset functions, RS-232 bidirectional serial control interface< Br/> 4) Peripheral processing equipment:
This sound reinforcement system is also equipped with peripheral equipment such as an antenna distributor, 4-channel feedback suppressor, and WIFI power sequencer< Br/> The antenna distributor can be connected to 4 sets of wireless microphones, which can extend the distance by 50-100 meters. The feedback suppressor can fully automatically handle howling, automatically adjust the positive and negative 6dB sound pressure to achieve balanced sound output, and can be connected to up to 4 sets of wireless microphone inputs. WIFI power sequencer can
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