I’ll admit it: When it comes to instruments, I’m a pretty emotional guy. What’s that phrase?—I think with my heart, not my head. I’ll buy an instrument only if, when I pick it up and play it, I feel ...

We see plenty of signature guitar models here at Guitar World, but none of them are quite like Martin’s 000JR-10E Shawn Mendes acoustic. The model, as Guitar World Tech Editor Paul Riario points out, ...