The Martin D-45 is a steel-string acoustic guitar made by C. F. Martin & Company. The model has been manufactured from 1933 to 1942, and again since 1968. The guitar was originally made of Brazilian rosewood. Martins are ranked among the highest-quality as well as among the most expensive guitars, and the D-45, regarded as one of the first "luxury guitars," was listed in 2011 as the most valuable production-model guitar.

The first D-45 was a dreadnought guitar based on the D-28 with luxury ornamentation (the "45" designation), made especially for Gene Autry, who in 1933 ordered "the biggest, fanciest Martin he could." This guitar is now encased in glass in the Gene Autry Museum of the American West in Los Angeles, California. The next year, one was made for Jackie "Kid" Moore, a "12-year old singing cowboy from Milwaukee, Wisconsin." These first two had a 12-fret neck; most others (except for the 6th, made in 1937) made afterward had a 14-fret neck. Two more were made in 1936 and two again in 1937; the D-45 wasn't catalogued until 1938. Other versions included a D-45S (with a special neck, 1939) and a D-45L (left handed, 1940). The D-45 was the top model of the dreadnought line, which also included the D-28 and D-18 models, priced much lower.

D45, D-45 or D.45 may refer to :

and also:

The word asshole, a variant of arsehole, which is still prevalent in British and Australian English, is a vulgar to describe the anus, often pejoratively used to refer to people.

The word arse in English derives from the Germanic root *arsaz, which originated from the Proto-Indo-European root *ors — meaning buttocks or backside. The combined form arsehole is first attested from 1500 in its literal use to refer to the anus. The metaphorical use of the word to refer to the worst place in a region, e.g., "the arsehole of the world") is first attested in print in 1865; the use to refer to a contemptible person is first attested in 1933. In the ninth chapter of his 1945 autobiography, Black Boy, Richard Wright quotes a snippet of verse that uses the term: "All these white folks dressed so fine / Their ass-holes smell just like mine ...". Its first appearance as an insult term in a newspaper indexed by Google News is in 1965. As with other vulgarities, these uses of the word may have been common in oral speech for some time before their first print appearances. By the 1970s, Hustler magazine featured people they did not like as "Asshole of the Month." In 1972, Jonathan Richman's Modern Lovers recorded his song "Pablo Picasso," which includes the line "Pablo Picasso was never called an asshole."

Eric Johnson (born August 17, 1954) is an American musician, songwriter, and vocalist from Austin, Texas. Best known for his electric guitar skills, Johnson is also a highly proficient acoustic, lap steel, resonator, and bass guitarist as well as an accomplished pianist and vocalist.

Johnson has mastered a wide array of musical genres evidenced by the many different styles incorporated in both his studio and live performances including rock, blues, jazz, fusion, soul, folk, New Age, classical, and country and western.

Guitar Player magazine has called Johnson "one of the most respected guitarists on the planet". Johnson's stylistic diversity and technical proficiency with the guitar have been praised by Bill Hicks. His 1990 platinum-selling, full-length album, Ah Via Musicom, produced the single, "Cliffs Of Dover", for which Johnson won the 1991 Grammy Award for Best Rock Instrumental Performance.

Born into a musically-inclined family, Johnson and his three sisters studied piano and his father was a whistling enthusiast. Johnson started learning the guitar at age 11 and rapidly began progressing through the music that would heavily influence his future style, including Eric Clapton, Mike Bloomfield, Chet Atkins, Cream, Jimi Hendrix, Wes Montgomery, Jerry Reed, Bob Dylan and Django Reinhardt, among others. At the age of 15, he joined his first professional band—Mariani, a psychedelic rock group. In 1968, Johnson and the group recorded a demo, which saw extremely limited release; years later the recording became a prized collector's item.

John Clayton Mayer ( /ˈmeɪ.ər/ MAY-ər; (born October 16, 1977) is an American pop and blues rock musician, singer-songwriter, recording artist, and music producer. Born in Bridgeport, Connecticut and raised in Fairfield, Connecticut, he attended Berklee College of Music in Boston. He moved to Atlanta in 1997, where he refined his skills and gained a following, and he now lives in New York City. His first two studio albums, Room for Squares and Heavier Things, did well commercially, achieving multi-platinum status. In 2003, he won a Grammy Award for Best Male Pop Vocal Performance for "Your Body Is a Wonderland."

Mayer began his career performing mainly acoustic rock, but gradually began a transition towards the blues genre in 2005 by collaborating with renowned blues artists such as B. B. King, Buddy Guy, and Eric Clapton, and by forming the John Mayer Trio. The blues influence can be heard throughout his 2005 live album Try! with the John Mayer Trio and his third studio album Continuum, released in September 2006. At the 49th Annual Grammy Awards in 2007 Mayer won Best Pop Vocal Album for Continuum and Best Male Pop Vocal Performance for "Waiting on the World to Change". He released his fourth studio album, Battle Studies, in November 2009. His fifth album, Born and Raised, was released on May 22, 2012. He has sold over 10 million albums in the U.S. and 20 million albums worldwide.