In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. Most full- and semi-acoustics in the Artcore price range use cheaper-to-make bolt-on necks. But Artcore guitars feature painstakingly crafted set-in necks for fuller tone, more sustain, and easier upper fret access. Ibanez introduced the first AM-bodied guitar in the early '80s. The AM features the traditional semi-acoustic shape in an untraditional compact size.