Get The Tone
Grant Green primarily used a Gibson ES330, a Gibson L7, an Epiphone Emperor and a D’Aquisto New Yorker Deluxe. For amps he favoured a late-‘50s tweed Fender Twin, a Gibson LP12, and various Ampegs at various times. He got his signature tone by pushing the midrange and turning the treble and bass right down on his amp. To emulate his sound, use a hollowbody guitar (ideally) with flatwound strings (and a wound third), roll the tone off to around 6 or 7 and use a clean valve amp which is just hinting at breaking up.