Def Leppard: Volume 4 – 2015-2023

Def Leppard have launched Def Leppard: Volume 4 – 2015-2023 on 2026-09-15, a boxed collection that rounds up the band’s recent studio work and a curated disc of rarities assembled by frontman Joe Elliott.

Why you should care: the set doesn’t just reissue albums — it opens the vault. The three main discs collect 2015’s Def Leppard, 2022’s Diamond Star Halos and 2023’s Drastic Symphonies, while a fourth disc (expanded across the box’s additional discs) delivers previously unreleased recordings, alternate mixes, live cuts and collaborations that give new colour to the band’s later-era output.

“At last! It’s here!” — Joe Elliott

The first rarity getting a public outing is a cover of The Beatles’ Revolution, tracked for an unnamed TV advertising campaign but never used. Fans will also find the six-track iTunes session from 2006 (issued later as The Lost Session), three live tracks recorded at Abbey Road in 2008, selections tied to the Mirror Ball project, and Apple-specific re-recordings of staples such as Rock Of Ages, Pour Some Sugar On Me and Hysteria from 2012–13.

Beyond those highlights, Volume 4 collects demos, radio edits and recent mixes: a 2026 mix of Personal Jesus, collaborations and outtakes (including a Miss You In A Heartbeat outtake featuring Ian Hunter), and guests ranging from Tom Morello to Sammy Hagar and Mike Garson in later studio or compilation appearances. That makes the set a useful stopgap for collectors who want the recent-era album material in sequence, plus a single package of scattered rarities.

The release is available as a six-CD box and an 11-disc vinyl edition; the band has made the set available for pre-order. For listeners who follow Def Leppard beyond their stadium hits, Volume 4 stitches together post-2015 record-era experiments, archive discoveries and a few genuine surprises — enough to make digging in worthwhile.