Piezo pickups often require a powered pre-amplifier to carry their output to match that of electromagnetic pickups. A generally utilized approximation utilized in choice of a pickup is that less wire (lower electrical impedance) provides brighter sound, more wire offers a “fat” tone.
In many cases, the electronics have some type of shielding to prevent pickup of external interference and noise. Piezoelectric, or piezo, pickups represent another class of pickup.
These make use of piezoelectricity to generate the musical signal and are in style in hybrid electro-acoustic guitars. A crystal is positioned under each string, often in the saddle. When the string vibrates, the shape of the crystal is distorted, and the stresses associated with this modification produce tiny voltages throughout the crystal that may be amplified and manipulated.
The vibration of the strings creates a small electric present in the coils surrounding the magnets. This signal current is carried … Read More