Sueooudh Audio Isolator Vehicle Common Ground Suppression Interference Noise Isolation Module Transformer Coupler 1Pcs

1. the earphone to with the car MP3 and car navigation AUX (3.5mm interface). If the sound heard from the earphone is no noise at this time, it can be confirmed the noise of the car device is caused by the common ground. 4. After starting the car, the installed amplifier has a current sound. In some models, the throttle is larger and the current is louder. This product can solve this problem. 3. Computer, amplifier, stereo, CD: a passive headset to plug in the computer to hear if there is noise, the phone to plug in the amplifier, audio audition, if there is no noise, the basic judgment is caused by the common ground. 2. the audio cable to the battery-powered mobile phone, or MP3 (note the mobile phone, MP3 is not connected to any source on the car, such as a telephone), and the AUX of the car center console, and play the music of the mobile phone. Noise can confirm the noise was caused by the common ground. 5. There is a current sound between the amplifier and the speaker or the sound. This product can be installed between the amplifier and the speaker.