Audiocontrol SA-4100i Measurement Microphone

so what is an RTA and why do you need one to tune your car audio system for optimum performance that's coming up because we're going to review the new audio control SI 4100 I RTA microphone so what is an RTA an RTA or real time analyzer is a device that measures the strength of a signal across various octaves within the sound spectrum an RTA microphone allows us to actually measure the acoustic output at each octave now when we're setting up a car audio system there are various things that affect the output at each frequency the speakers for example will inherently in their design play one frequency slightly louder or quieter than another the vehicle environment also has a huge impact on output at all these different frequencies even when fed the exact same signal the left side can sound totally different than the right side we will use an RTA microphone as a tool to correct all of thos