Keyboards
Most digital stage pianos have weighted keys or semi-weighted keys. Fully weighted keys are designed to replicate the weight and playing action of acoustic piano hammer-action keys. Semi-weighted keys save weight, which is an important consideration for a mobile stage piano. Stage pianos usually have 88 keys, which is standard for all modern acoustic pianos. However, some stage pianos have fewer keys, such as the Kurzweil SP76. It has only 76 semi-weighted keys, but is still called a stage piano because of its layout and weighted keys.
Read more about this topic: Stage Piano