The AU series features very unique construction. Rather than being built with a separate top, sides, and back like most ukuleles, the body of the AU starts as a solid block of wood and is routed out, so that the back and sides are a single piece of wood. A top is then added to complete the body. This construction method gives these instruments a unique sound and brilliant playability. They also utilize distinctive features such as a Stereo Sound Port, Elevated Comfort Armrest, and Edgeless Comfort Heel.
  body shape AU tenor body
  top Spruce top
  back & sides Solid Paulownia back & Solid Paulownia sides
  neck AUT Okoume neck
  fretboard Purpleheart fretboard
  bridge Purpleheart double hole bridge
  inlay White dot inlay
  tuning machine Black Die-cast tuners
  number of frets 19
  strings Aquila® Nylblack Tenor
  string gauge .026/.033/.039/.029
  string space 15mm
  factory tuning 1A,2E,3C,4G