Sam Phillips an impromptu session featuring the four musicians. Phillips challenged the four to achieve gold record sales, offering a free Cadillac to the first, which Carl Perkins won. The contest is commemorated in a song by the Drive-By Truckers. By the mid-1960s, Phillips rarely recorded. He built a satellite studio and opened radio stations, but the studio declined, and he sold Sun Records to Shelby Singleton in 1969. In 1977 Sam's sons, Knox and Jerry, were working with John Prine at the Phillips Recording Studio when Sam Phillips joined them to oversee recordings that were eventually included on the album "Pink
Recording studio specific orders never to mop the bare wooden floor for fear it might alter the acoustic properties of the hall. There were several other features of studios in this period that contributed to their unique "sonic signatures". As well as the inherent sound of the large recording rooms, many of the best studios incorporated specially-designed echo chambers, purpose-built rooms which were often built beneath the main studio. These were typically long, low rectangular spaces constructed from hard, sound-reflective materials like concrete, fitted with a loudspeaker at one end and one or more microphones at the other. During a recording session,