On this day in music history: March 8, 1994 – “Superunknown”, the fourth studio album by Soundgarden is released. Produced by Michael Beinhorn and Soundgarden, it is recorded at Bad Animals Studios in Seattle, WA from July – September 1993. Work on the Seattle based rock bands fourth release begins in mid 1992 while they are on the road in support of their previous album “Badmotorfinger”, writing the songs over the next year. The band work with producer Michael Beinhorn (formerly of the band Material), best known for his work with The Red Hot Chili Peppers and Herbie Hancock. A major critical and commercial success upon its release, the album is the bands mainstream breakthrough, becoming an airplay staple on both alternative and mainstream rock radio. It spins off five singles including “Black Hole Sun” (#1 Mainstream Rock), “Spoonman” (#3 Mainstream Rock), and “Fell On Black Days” (#4 Mainstream Rock) and winning two Grammy Awards including Best Metal Performance (“Spoonman”) and Best Hard Rock Performance (“Black Hole Sun”) in 1995. The album is also issued as a limited edition vinyl double LP set, pressed on colored (orange, blue, green, and clear) vinyl. It is remastered and reissued for its 20th anniversary in 2014, as a two disc edition with the second CD featuring demos, B-sides and live tracks. The album is also issued as a five disc (4CD’s + Blu-ray disc) Super Deluxe Edtion featuring even more bonus material. The DVD-A disc includes a high resolution Blu-ray disc featuring new 5.1 surround mixes. “Superunknown” debuts at number one on the Billboard Top 200, spending one week at the top, and is certified 5x Platinum in the US by the RIAA.