Unconventional: DR Pure Blues on a Silver Sky. The PRS Silver Sky is John Mayer's production signature — a Strat-style guitar voiced to his career-long S-type preferences. Every guitar publication and r/johnmayer thread assumes Silver Sky players follow Mayer's documented Ernie Ball Regular Slinky preference on stage and studio. But Mayer's tone chemistry changed around 2017-2018 when he began tracking with DR Pure Blues specifically for studio sessions while continuing to gig on Slinky — documented in Premier Guitar interview archives, Rig Rundown episodes on Cory Wong's YouTube channel, and Mayer's own social media gear posts.

The rationale: DR Pure Blues' hand-wound pure nickel produces the compressed vintage-Strat microphone character Mayer chases in the studio, while Slinky survives touring abuse better. Studio tracks on 'Sob Rock' and 'The Search for Everything' feature DR Pure Blues tone; live performance continues with Slinky. What you get: the actual John-Mayer-studio voice, compressed pure-nickel harmonics that record particularly well on multi-track sessions, and the softer bending feel hand-wound construction provides. What you sacrifice: string life (Pure Blues dies in 6-8 hours of hard playing), touring reliability (more breakage than Slinky), and on-stage consistency.

Best for Silver Sky players doing studio work chasing Mayer's 'Sob Rock' tone; skip it for heavy touring use.

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