7800° Fahrenheit is the second studio album by American hard rock band Bon Jovi, released on April 12, 1985 through Mercury Records. The album's title was a reference to the supposed melting point of rock. The album introduced the classic 1980s Bon Jovi logo that would later on be used for Slippery When Wet and New Jersey.
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 and excluding extremely rare performances of the song 'Tokyo Road' in Japan once every few years and 'Only Lonely' a few times during The Circle Tour in 2010, nothing from this album has been performed live since the late 1980s.