Answer one by one

The most direct way to identify the authenticity is to go to the official website and enter the piano number directly. The factory date, configuration, sales place, etc. are all clear at a glance, even for individual limited editions. There is even buyer information

The tone of a dry piano is determined by the pickup, and the delay is determined by the coil. Facts have proved that EPI is not very good in both aspects and is average

Then there is the signature. The signature is just an identity, it does not mean that the quality of the signature model is better than the ordinary one