We say :

The GP-3 is a marvel to behold, fusing traditional grand piano luxury with a streamlined design that’s only possible with a modern digital instrument. Embedded inside the GP-3’s elegant exterior is a complex piano ecosystem born of decades of Roland development. Every element works together to deliver a complete piano experience, from the sound engine, keyboard, and pedals to the custom speaker system. And with easy volume control, mobile device connectivity, and other digital benefits, the GP-3 is a perfect fit for today’s lifestyles.The GP-3 features an integrated stereo speaker system specially tuned for top-quality sound and maximum projection from the low-profile cabinet design. Powerful amplification and advanced sonic processing deliver an immersive, room-filling piano experience for the player and listeners. You can even adjust the overall tone color by opening the lid and setting it to different positions—just like an acoustic grand.

Roland say : 

The GP-3 is the most compact and affordable grand in the acclaimed GP series, bringing you premium piano performance in a unique low-profile design that makes a statement in any living space. Roland’s modern features and benefits are infused throughout, from the organic piano sound engine and responsive hammer-action keyboard to onboard recording, Bluetooth audio/MIDI connectivity, and deep integration with the Roland Piano App. If you’ve always wanted a grand piano but thought you didn’t have the space or budget to make it happen, the GP-3 turns your dream into reality.