Sometimes when you plug your portable music player into the aux input on your car's receiver, but there's an annoying whine along with the music.
SNI-1/3.5 preamp noise filter plugs in between your receiver's auxiliary input and your portable music player to help reduce noise caused by a ground loop.
The filter includes a female 3.5mm input, a male 3.5mm output, and 10 inches of cable for each jack.
This noise filter is great for eliminating ground loop noise between an auxiliary source and radio.
Close to perfect response of +/- 0.03 dB from 2-20,000 Hz
Utilizes proprietary audio transformers for a 1.3 dB gain