Performance Beyond Expectation is written by professional Mobile DJ Entertainer Ray Martinez from Anaheim, CA. Ray Mar as he is affectionately known professionally, has been entertaining audiences around the United States since 1974. With nearly 30 years experience and spanning 4 decades, Ray Mar has seen many changes in the mobile DJ industry. With the contacts he has made over the years, Ray Mar has enlisted the expertise of many veteran DJ's across the country to collaborate in this labor of love to offer guidance, wisdom, inspiration, but most of all education to all DJ's weather they are just starting out or are seasoned veterans.