7800° Fahrenheit is the second studio album by American rock band Bon Jovi, released on March 27, 1985, through Mercury Records. The album's title was a reference to the supposed melting point of rock, equivalent to 4313° Celsius; as the Fahrenheit scale is primarily used only in the United States, 7800° Fahrenheit thus suggested "American hot rock."
The album recorded in six weeks between January and March 1985 at the Warehouse Studios in Philadelphia, Pennsylvania. The album marked the final collaboration between Bon Jovi and producer Lance Quinn. It is also the only Bon Jovi album to feature songwriting contributions from four of the band members, with "Secret Dreams" being the only Bon Jovi song to-date for which drummer Tico Torres receives a songwriting credit.
Despite being a fan favorite, the band was unsatisfied with the sound of the album and essentially disowned it once they had solidified their status as major rock stars with the albums Slippery When Wet and New Jersey a few years later. It is the least represented album in their setlists over the course of the career, with nothing from 7800° Fahrenheit performed live after the New Jersey Syndicate Tour except a few performances of “Tokyo Road” in Japan during the 1990s, a few performances of “Only Lonely” during The Circle Tour in 2010, and one performance of “Tokyo Road” in Hawaii also during The Circle Tour.