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John Mayer's Commonly Used Techniques | Liberty Park Music
John Mayer busts out rare double-neck acoustic for his solo arena tour
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John Mayer: '90% of a Guitar to Me Is the Strings' | Music News @ Ultimate-Guitar.Com @ Ultimate-Guitar.Com
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Martin Guitars Shares Video Showing Repair Process On John Mayer's OM-28JM Signature Model [Watch]
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John Mayer: “90 per cent of a guitar to me is the slack in the strings” | MusicRadar
Martin OMJM John Mayer 20th Anniversary Acoustic-electric Guitar - Platinum Gray Burst | Sweetwater
John Mayer's Guitar Rig Gear, Pedals, Amps, Strings