The CT-S1-76 features Casio's advanced AiX Sound Source. This sound source technology delivers highly expressive sounds created by thoroughly analyzing and recreating the unique characteristics of various instruments. This includes acoustic instruments such as grand pianos and strings, as well as electric instruments like electric pianos, and even electronic instruments like synthesizers. Each sound has been meticulously crafted to capture the true essence and unique musical potential of the original instruments to allow for realistic musical performances.. It features 61 carefully selected tones, ranging from acoustic pianos, electric pianos, organs and many more, which also includes a number of vintage instruments. The panel layout has been simplified so that you can effortlessly access and enjoy a wide range of premium sounds. Experience the immersive and powerful sound of the CT-S1-76's, thanks to Casio's exclusive Horizontal Bass-Reflex System. This innovative technology allows for the creation of robust bass sounds even in limited space. Enhanced from the previous CT-S1 model with 6.5W+6.5W amplifiers that deliver powerful and immersive sound in a compact body. In addition, the Volume-Sync EQ ensures consistent sound quality across all volume levels. With the built-in surround function, you can enjoy a rich sound with added width and depth with just the touch of a button.