Feel the weight of the whole piano with your hands, because the real piano is solid mahogany and can weigh up to 8 kilograms. If it's a fake piano, it's usually lighter.
Connect the speaker (good speaker), first turn down the volume of the piano and listen to whether there is noise in the speaker. If the timbre of the original piano has a lot of noise, it is a fake piano.
Timbre, the real EPIPHONE sound is warm and thick. If you play with the pickup of the neck, the timbre is dry and sharp, which is false.
EPIPHONE said that the LOGO on the genuine piano head looks integrated with the piano head, while the fake one looks like it is painted or has a bump.