The album marks a darker approach to the
twee pop for which the band is known, due largely to an increased use of guitar distortion, more professional production, and increased emphasis on Calvin Johnson's deep voice than in the group's earlier recordings. The majority of the songs are sung by
Calvin Johnson, while
Heather Lewis only provides vocals on two songs, the uncharacteristically brash "In Between" and the more typically understated "Ask Me." At the time of the album's release, Johnson described
Jamborees sound as "dark and sexy." Still, the band retained their emphasis on exuberance over musicianship, as
Bret Lunsford stated in an interview that, while recording album opener "Bewitched," his guitar string got stuck on a protruding screw and he continued to play through the song, hitting the string a bit harder until it became unstuck. Author
Dave Thompson, in his book
Alternative Rock (2000), wrote that it "captur[es] the same aura of unamplified amplification" as on ''
Rock 'n' Roll with the Modern Lovers'' (1977) by
Jonathan Richman and the Modern Lovers. ==Release and reception==