FAQs for a Piezo Pickup
A piezo pickup captures sounds from stringed instruments like the guitar or violin and translates them into electrical signals for amplification. It uses a different technology than other pickups. Most guitar pick ups are magnetic. They use a coiled up wire with a magnet to catch the sound. Piezo pickups have a kind of pressure system that translates the sound. They are light weight and have powerful amplification capabilities.
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Where are Piezo Placed?
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On an acoustic/electric instrument, the piezo pickup is typically placed inside the bridge directly below the saddle, which holds the strings of the instrument. This keeps the pick up close to the strings. On an electric instrument, the pickup sounds best when it's placed outside of the bridge and directly beneath the point where the strings are closest to the body.
Do Piezo Pickups Sound Different From Other Pick Ups?
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Piezo pickups have a brighter sound than magnetic pickups and provide a slight bass boost. They allow a high volume before feedback or reverb kicks in. Some musicians complain that because of the placement of the pickups, they cannot hear the way the body of the instrument resonates. Still, the distinct qualities of the piezo make it highly desirable.
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How do they Work?
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Piezo originates from a Greek word that means "to squeeze." The pickups are made of a hard ceramic or a type of polymer. The way the sound hits this material is converted into an electrical charge that is proportional to the pressure applied by the vibrations. This process excites a preamp that converts the electrical signal back to sound, and then sends the sound out through an amplifier.
How do Piezo's Combine with a Preamp?
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When using a piezo pickup, a preamp is necessary because of the conversion process. Preamps are usually sold with the instrument, or as part of an amplifier. The preamp allows the musician to shape the volume and tone of the instrument.
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