24V to 12V High/ Low Impedance Noise Filter Suppressor for Auto Car

so to filter out engine noise from a car stereo you may use one or both of these filters here we have a ferrite core electric filter and here we have an RCA line-level filter before we know which one we need we're going to have to do a little troubleshooting so I've mocked up here a radio and amplifier installation and it's a fairly common setup we have a radio running on two RCA cables 2 a 4 channel amplifier and we have engine oils in the car but first we need to find out where the noise is coming from before we can filter it out so you have to do some testing first and the first thing you're going to do is start the car go to the back of the radio and disconnect the RCA if in disconnecting the RCA cables the noise goes away then you're going to want to reach for the electrical filter with a ferrite core and you'll filter either the power on the constant wire from the battery to your