partsrep said:They are one and the same, in either single CD or 6 CD models. By holding the SSP button for three seconds and then using the volume control button it can be toggled between xA and xB settings. As the xA and xB have different interiors the HU allows for the appropriate base settings.
Single CD players come only withn the orange backlighting that matches 4th gen Runners while the 6 CD player has color choices.