Derived from Yamaha's FS820, which has the solid spruce top and mahogany back/sides, the FSX820C comes with a cutaway body and adds System 66 electronics plus an SRT Pickup. Yamaha's proprietary under-saddle piezo pickup and System 66 analog preamp ensure you'll always have a solid plugged-in performance. The small and thin body is perfect not only for female/young players, but for intermediate-to-upper level finger-picking style players as well. - Special Bracing - Yamaha's FS guitars have a louder and stronger sound in the low-to-mid ranges, thanks to cutting-edge acoustic analysis technology developed by the Yamaha R&D Division. Yamaha's engineers have achieved this sound by utilizing analysis and simulation to arrive at the best bracing design without depending on tradition or guesswork. This analysis led to the development of the new scalloped bracing pattern, a new and ideal acoustic structure that maintains the durability of the top board while bringing out the most sound the Yamaha FS has to offer. - Thinner body - The FS model body is 10mm slimmer than that of the FG body, offering increased comfort and playability with no loss of volume or bass. Having a body that is easier to hold makes the FS more appealing to beginners and smaller guitarists, including female players. In addition, the smaller dimensions and lower propensity to feedback make FS guitars ideal for stage use. - System 66 Electronics - System 66 feature an under-saddle piezo pickup developed by Yamaha. Controls include a 3-band EQ, an adjustable mid-range frequency control, and a precision chromatic tuner for optimum sound tailoring. The system is powered by easy to obtain AA-size batteries that provide a stable power supply for improved sound quality. *9 Volt battery not included.