Teaching system power amplifier

产品型号Product model：    

面板颜色Panel color：        黑色细杪（默认）Black fine Miao (default)

产品图片Product pictures：

产品介绍：

本功率放大器系列专为教学系统开发而设计，可用于教学课室、教堂、礼堂等场合,带数字显示功能，让操作都对当前音量一目了然。

产品特点:

◆ 高保真数字防啸叫功能。

◆ 本设备安装简单功能实用，精准可靠使用方便。

◆ 内置自适应动态噪声滤波器，可滤掉现场环境的背景噪声但不影响语音信号高质量的传送。提高信噪比，改善音质。

◆ 内置高低通调节控制，可控制制语音频响。

◆ 人声激励功能，可提升语音清晰度。

◆ 一路话筒输入，四路48V幻象电源电容麦克风输入。

◆ 两路线路输入、一路录音电平输出。

◆ 自动保护、自动增益、动态保护。

◆ 本产品对人声保真度高，使说话者的声音从音箱还原出来的声音变音非常小。

◆ 带数字显示功能，让操作都对当前音量一目了然。

◆ 可对初始音量和最大音量进行设定。

◆ 功放自带蓝牙，U盘，SD卡播放，录音功能   

技术参数：
输出功率：              8 ohm 200W×2
频率响应：              20Hz-20KHz(±0.5dB)
信噪比：                ≥79dB
立体声分离度：          ≥56dB
总谐波失真：            ≤0.01%(20Hz-20KHz)
线路输入灵敏度：         0.775V (0dB)
线路输出灵敏度：         0.775V (0dB)
有线话筒输入灵敏度：     -28dB
功放通道效率：           ≥85%
界面话筒输入灵敏度：     -30dB
界面话筒极化电源：       48V DC
输出阻抗：               8 ohm
音调控制音乐：           高 低音±12dB,
麦克风：                    高 低音±12dB

Product introduction:

This power amplifier series specially designed for teaching system development, can be used for classroom teaching, churches, halls and other occasions, with digital display function, make operation on the current volume be clear at a glance.

Product features:

l Pieces DSP hi-fi digital proofing the noise function.

l The equipment installation simple function and practical, accurate and reliable usage is convenient.

l Built-in adaptive dynamic noise filter, can filter out the scene environment background noise but does not affect the transfer of a high quality speech signal.Improve the signal-to-noise ratio, improve quality.

l Built-in discretion through adjusting control, can control audio sound system of language.

l Mixer vocals incentive function, can improve speech intelligibility.

l In pieces all the mic input, four-way 48 v phantom power capacitor microphone input.

l Pieces of two routes road input, the recording level output all the way.

l Mixer automatic protection, automatic gain, dynamic protection.

l Pieces of this product to high fidelity of voices, make the speaker's voice from the loudspeaker sound

l reduction of sound change very little.

l Mixer with digital display function, make operation on the current volume be clear at a glance.

l Pieces can be to set the initial volume and the maximum volume. 

Technical parameters:

Output power:                            200 w x 2   8 ohm

Frequency response:                       20 hz - 20 KHZ (+ / - 0.5 dB)

Signal to noise ratio:                       79 db or higher

Stereo separation degree:                   56 db or higher

Total harmonic distortion:                   0.01% or less (20 hz - 20 KHZ)

Line input sensitivity:                       0.775 V (0 db)

Line output sensitivity:                      0.775 V (0 db)

Wired microphone input sensitivity:             - 28 db

Power amplifier channel efficiency:              85% or higher

Interface microphone input sensitivity:           - 30 db

Interface microphone polarization power:        48 v DC

Output impedance:                            8 ohm

Tone control music:                            high and low + / - 12 db,

The microphone:                              high and low + / - 12 db