THE standard stereo on the Insight is a four-speaker CD radio system. It uses a combination of small buttons and two knobs, with the oft-used power/volume knob positioned close to the driver but can be frustratingly difficult to turn on/off with its inclusion of a push-mute feature. A cassette player is not provided. Space for a six-disc in-dash CD changer, available as a dealer-fit accessory, is made below the standard head unit.