According to my documents this model does have midrange and tweeters for L & R sides, but no vibrasonic feature.
Thanks "RepairTech",I was going off a model number listed in the discussion section of a YouTube video. Here's a link to the video http://www.youtube.com/watch?v=dhobhOGGPUo
Is there any chance you might know what portable has the Vibrasonic?
DougVanCleave had mentioned it was the biggest most powerful Motorola portable stereo.