The usage of the Yamaha P45 is highly dependent on your requirements. The model was originally designed for practice purposes and small-scale activities and gained wide recognition in this regard. However, it is limited in terms of sound performance and can not be used for large-scale activities. Thus, if you are a professional and want to use the piano for small activities, you will not face any performance issues. Similarly, you can improve the sound output for larger projects by connecting it with external speakers that can be attached to the piano via the USB port.