The Gibson J-45 acoustic guitar can be heard across decades of recordings in the hands of country stars, folk legends, singer-songwriters and solo instrumentalists. It is one of America's most iconic acoustic guitars. Its sloped shoulders and more mellow tone set it apart from Martin's legendary dreadnoughts. Those exact quirks are the reason so many have fallen in love with the Gibson J-45. Vintage specimens (especially pre-1970) are incredibly collectible, while more modern specimens are studio and touring favorites of working musicians.