At which Los Angeles studio did Metallica record most of its self-titled 1991 album?

Metallica recorded most of its self-titled 1991 album at One on One Recording Studios in Los Angeles.

The main recording sessions began there in October 1990 and continued for roughly eight months. The facility became the primary setting for the band’s work with producer Bob Rock, engineer Randy Staub, and assistant engineer Mike Tacci. The length of the sessions reflected both the band’s perfectionism and the demanding new production approach.

Metallica also spent about a week recording at Little Mountain Sound Studios in Vancouver, British Columbia. Additional overdubs and mixing took place at A&M Studios in Hollywood. Those extra locations are why answers naming A&M Studios can sound plausible, even though One on One was the principal recording studio.

The sessions were notable for the band’s attempt to work more collectively in the studio. Rock pushed Metallica to record with a stronger live feel rather than constructing every part separately. The resulting album combined tighter production with a more direct band performance.