Polarity Tester
GVS139 - Hangzhou JiGao Electroacoustical Science and Technology Co.,Ltd (CRY Sound Co., Ltd.)
GVS139 polarity tester adopts impulse testing and is free from impacts of environmental noise. It can rapidly and automatically determine positive and negative poarity of loudspeaker, earphone, TV, stereo, horn and voice coil receiver and is applicable for production line. Meanwhile, foot switch can be used to change sweeper and FO, impedance meter for applying.