It was recorded during the same sessions of the recording of Leucocyte (album), whilst the Swedish trio were touring around Asia and Australia. The disc is named after the 301 Studios in Sydney
Before his death, Svensson was actually involved in the editing down of the sessions into what might have been a double album. In the end, surviving members Magnus Öström and Dan Berglund elected to delay the release of 301. Regular sound engineer Åke Linton was also a key presence in the recording, editing and mixing process.