Martin OM-45 John Mayer 20th Anniversary Acoustic-Electric Guitar
John Mayer's Guitars, Gear & Pedalboard | Equipboard
Ernie Ball - John Mayer has been using Ernie Ball Regular Slinky electric guitar strings to nail his signature tone for more than a decade. Do you? Join the legacy. #iplayslinky | Facebook
John Mayer: “90 per cent of a guitar to me is the slack in the strings” | MusicRadar
John Mayer's Guitar Rig Gear, Pedals, Amps, Strings