Yamaha constantly strives to update and improve its product line, and adding a new model to the popular RGX series is one of the company’s latest efforts on the 6-string side to offer players something new. Among the things that make the RGX-A2 intriguing is its proprietary A.I.R. (Alternative Internal Resonance) body construction, which is intended to enhance tonal response and diminish weight. To reach these goals Yamaha did several things: They constructed the body from a lightweight falacata wood core, and then sandwiched it between a top and back made from denser, harder maple. Configured within the body are also a series of “sound tubes” that allow the internal area to vibrate more freely. Further design tweaks were employed to help channel the vibrations to the strings and pickups.