He was a student of Manuel Ramirez, the best guitar builder of the whole Ramírez dynasty. He supposedly built the guitars that Segovia played for many years and then which Hermann Hauser copied for Segovia, which made H. Hauser I into one of the most famous guitar builders of the 20th century. The flamenco guitars from Santos are among the best that I have ever owned. They are light with an unbelievably deep and low-pitched bass and crystal clear ringing high notes in spite of that.