Yamaha CSF-TA TransAcoustic parlor guitars transport you to new creative spaces with immersive reverb and lush chorus effects without needing an amp or other external gear. Actuator An actuator installed on the inner surface of the guitar back vibrates in response to the vibrations of the strings. The vibrations of the actuator are then conveyed to the body of the guitar and to the air in and around the guitar body, generating authentic reverb and chorus sounds from inside the body. Scalloped Bracing The CSF series utilizes newly-designed scalloped bracing that delivers rich, full-bodied resonance. The use of forward-shifted construction maintains the strength of the body while maximizing the vibration of the guitar's top. Newly-Designed Battery Box The battery box integrated into the end-pin jack requires fewer holes in the body. This reduces acoustic sound loss. Connect the cable form the jack to a PA or amp to use as an acoustic-electric guitar.