stereo amplifier power filter 12v 2pcs noise reduction 1Wide Compatibility: Professional power filter is suitable for most Dc 12V devices and compatible with car stereos receivers, equalizers, amplifiers, speakers, etc. 2Reduce Audio Noises: Amplifier noise reducer is able to reduce noise generated by the cigarette lighter or the other electronics to get crystal clear sounds from the car speakers. 3Improved Sound Quality: Audio power filter improves the quality of the audio signal by filtering out noise and interference signals from the power supply, resulting in better audio results. 4Advanced Material: Stereo power supply filter is made of high class Abs, which is wear resistant, sturdy and durable and has a long service life. 5Easy to install: Stereo noise suppressor reducer is designed to be easy to install, saving time and money on installation costs.