(function(){
let w = window.innerWidth;
function setHeaderCssVar() {
const headerEle = document.getElementById('shoplaza-section-header');
if(!headerEle){ return };
document.body.style.setProperty('--window-height', `${window.innerHeight}px`);
document.body.style.setProperty('--header-height', `${headerEle.clientHeight}px`);
const mdScorllHideEle = headerEle.querySelector('.header__mobile .header__scroll_hide');
if (mdScorllHideEle) {
document.body.style.setProperty('--header-scroll-hide-height-md', `${mdScorllHideEle.clientHeight}px`);
}
const pcScorllHideEle = headerEle.querySelector('.header__desktop .header__scroll_hide');
if (pcScorllHideEle) {
document.body.style.setProperty('--header-scroll-hide-height-pc', `${pcScorllHideEle.clientHeight}px`);
}
}
function handlResize() {
if(w == window.innerWidth){return};
w = window.innerWidth;
setHeaderCssVar();
};
function init(){
setHeaderCssVar();
window.removeEventListener('resize', window._theme_header_listener)
window._theme_header_listener = handlResize;
window.addEventListener('resize', window._theme_header_listener);
}
init();
})();
${data.index + 1}/6
Description
Amplifier PCB Board Car Amplifier Board 4 Channel 50W*4 12V Audio ACC Amplifier TDA7850 for Modified Audio
Product Description
Revision: The new board has improved wiring, smaller size than the boss, better stability, small size and easy installation.
TDA7850 4 Channel Amplifier Board
1. The power amplifier board uses TDA7850 4-channel chip, equipped with a lotus adapter board with shielded wire, and has an ACC control interface. 2, Use 6800uf+1000uf double capacitor filter to ensure the effect under large dynamics. 3, The power amplifier chip is guaranteed to be brand new and genuine, and the resistance of the four speaker output ports of the genuine chip is between 2.8K-3.1K (due to the different models of test multimeters, the test resistance values are slightly different) 4, with ACC control (note: if ACC control is not used, the ACC terminal should be connected to the positive pole of the power supply, otherwise it will be in a mute state)
item
value
Output power
4X50W
Working voltage
DC 10V-15V
Channel
4 channels
Board size
66mm X 43mm
Without Chip Amplifier board
1, 4-channel power amplifier board, without power amplifier chip, the board can be installed: TDA7850, TDA7851, TDA7854, TDA7388 PA2030 and other power amplifier chips 2, The power amplifier board does not have a power amplifier chip, but is equipped with a lotus adapter board with shielded wires, and is equipped with an ACC control interface. 3, Use 8200uf+1000uf double capacitor filter to ensure the effect under large dynamics.
Note
Revision: The new board has improved wiring, smaller size than the boss, better stability, small size and easy installation. If you need to use the 27-pin A chip, you need to make a small change. Method: Cut the 1 and 27 pins of the 27-pin with A chip, and then insert the 2-pin corresponding to the 1-pin of the board and install it. The corresponding relationship between the pins is as follows:
Parameter
Working voltage: DC 9V-15V Channel: 4 channels Board size: 68.5mm X 52mm
