1. Strings: The E-Cello has metal strings that are similar to those found on an acoustic cello, but they are not directly responsible for producing sound. Instead, they vibrate when plucked or bowed.
2. Piezoelectric pickups: Underneath each string is a small piezoelectric pickup. These pickups are made of a material that generates a voltage when it is subjected to mechanical stress. As the strings vibrate, they cause the piezoelectric pickups to vibrate as well, generating a small electrical signal.
3. Preamplifier: The electrical signals from the piezoelectric pickups are very weak, so they need to be amplified before they can be played through a speaker. This is done by a preamplifier, which is usually built into the E-Cello's body.
4. Amplifier and speaker: The amplified electrical signal from the preamplifier is then sent to an external amplifier and speaker, which further amplifies the signal and produces the sound that we hear. The amplifier may also include tone controls, effects processors, and other features that allow the cellist to shape the sound of their instrument.
Overall, the E-Cello's ability to produce sound relies on the conversion of string vibrations into electrical signals through the use of piezoelectric pickups and a preamplifier, followed by amplification and playback through an external amplifier and speaker system.