Lexus - Replace Factory Radio - Help Scout

When replacing your factory radio with an aftermarket radio you will want to not cut any of the factory wiring. Radio replacement harnesses make this very easy with a simple plug and play connector so you don't have to splice power, ground and speaker connections to the aftermarket radio connector that is included with your new aftermarket radio.
Tune your car stereo system to suit your needs or correct your vehicles natural acoustic problems with an equalizer also known as an EQ. Adjust individual bands or range of bands with a parametric equalizer and tailor your systems frequency response to your ears.

Equalizers are multi-channel sound enhancement devices, designed to input sound outputted from audio sources such as receivers; and seamlessly filter/bypass and send (return) that audio source (output) to the same or other audio peripherals.