At this price of around 200€ the Prodipe SA27 MHS Auditorium is a killer guitar. The choice of all Mahogany body & top is soothing both the ear and eye, and the guitar is comfortable and easy to play. Prodipe uses heat treatment to arch the back of the SA27 MHS, it also has no bracing. The result is simple: more projection and loudness. Prodipe calls this technique "ARCH-BACK" and applies it to all of their guitars under the 27 series.