A factory stereo can have the voice of a top aftermarket system when it has AudioControl factory radio upgrades. Digital sound processors such as the Epicenter AudioControl Bass Maximizer eliminate the vehicle manufacturer’s constraints to restore concert-like clarity. Use a line output converter to connect speaker-level and RCA devices, which allows for more amplifier choices. We also have the AudioControl Matrix Plus line driver plus equalizers, factory integration amplifiers, remote controls and much more. Shipping is always free at OnlineCarStereo.com.