古典吉他
In 2014, Kastning once again collaborated with Alistair Hay of the Irish company, Emerald Guitars, to conceive of and build the 15-string Extended Classical guitar. This is a classical nylon-string guitar with six double-courses, and three bass single courses. It also features a Multi-scale. This is known as the Kevin Kastning Signature Series 15-string Extended Classical guitar.