New Miner silencer for L3 S9 S17 L7 S19pro whatsminer

Discription One silencer can drive two machines, and a small machine can carry four. At present, most of them can be used, and the noise can be reduced by about 40 decibels. After noise reduction, the sound is similar to that of an electric fan .The fan has three gears of high, medium and low adjustment. The red line is high speed, the blue line is medium speed, the black line is low speed, and the yellow line is connected to the zero line. Do not connect the wrong  wire, the motor will burn if you connect the wrong wire. Introduction of Noise reduction box:This machine can host 2 miners at the same time, it can use for antminer all types miners, and also can cool for miner and reduce for noise at the same time! Not only the temperature and noise reduction, and can effectively isolate the dust in the air, we know that the dust will make machine and hashrate board damage easy, even after use half a year or a few months , machine still look like new, and more valuedMaterial of noise red