Def Leppard has offered a glimpse into their creative process with a newly released rough mix of “Photograph,” taken from their upcoming Pyromania 40 box set.

You can listen to the song below.

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As its title suggests, “Photograph (Rough Mix Version)” features fewer of Mutt Lange’s production tricks and has an unfinished lead vocal from Joe Elliott. Nevertheless, the punchy guitar riffs, soaring vocal harmonies and anthemic hooks that made the song a smash hit are all present.

Def Leppard will release Pyromania 40 on April 26. The reissue will be available as a four-CD/Blu-ray box, a one-LP half-speed master, two-LP black vinyl, two-LP colored vinyl, two-CD and digitally. The four-CD/Blu-ray box includes the remastered original album, a disc full of demos and outtakes, live footage from two different 1983 concerts, several official videos and an instrumental mix of the album. It’s available to preorder on the band’s website now.