Q: What does the Tone knob do on the newer HD acoustic models on the JTV guitars? A: The Tone knob on the new HD acoustic models is used to adjust the amount of body resonance for the model, but it was also specially programmed to have the top 10% of the Tone knob completely remove this resonance (at the 90-100% position) for those that prefer to remove that sound from the new acoustic models to closely resemble the flat nature of the older acoustic models from previous Variax guitars.
I totally stand corrected on my first post i think that was before the HD models