The AC models have been re-engineered to improve resonance for an authentic classical guitar sound. The nice combination of tone-woods yields a traditional, deep and delightfully mellow tone. Cort AC series is very forgiving of student mistakes, requiring slightly less precision and sharpness for a good tone. AC70 has a smaller body size, shortened scale to help players on their journey, specially designed for novices, but with pro-level features and quality materials for an authentic playing experience.