Ingenious design, long delay, perfect earphone protection;
Power supply: AC16v-22v (single winding) Recommended AC20v*1
Printing plate size: 137*117mm 2mm thick printing plate, 70um thick copper
The noise of this board: within 0.4mV
The midpoint of the board: within 1mV
![](https://ae01.alicdn.com/kf/Ha8ccf7e7f1094c64bbbd751f512c79233.jpg)
![](https://ae01.alicdn.com/kf/Hca8e4490e0a6448fbcaeacc85a3f8812y.jpg)
![](https://ae01.alicdn.com/kf/Hfba30dee11ca4fae87d1a5f553c009ceN.jpg)
![](https://ae01.alicdn.com/kf/H33d71c4f2f4d41d6b671ab04b82adcadh.jpg)
![](https://ae01.alicdn.com/kf/H9a5a5f1a6b60468baee345dbe342d28eB.jpg)
![](https://ae01.alicdn.com/kf/H0cb9a990f13941da9987b50ec417ffdaF.jpg)