Yet another Clash box set is due out this fall.

The 12-disc Sound System set -- due out September 10th -- contains the band’s first five studio albums (across eight CDs); three discs featuring demos, non-album singles, rarities and B-sides; and a DVD with previously unseen footage shot by both Julien Temple and Don Letts, original promo videos and live footage.

Also out on September 10th will be a two-disc best-of called The Clash Hits Back.

The first Clash box set, Clash on Broadway, was released in 1991. The group has also done four previous best-of compilations.

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