Abstract: The present invention is a pickup system including a transducer, a mount, and a cartridge for modifying perceived sound from a musical instrument. The transducer includes a housing, a magnet and an electric signal carrier. The mount attaches the transducer to the instrument. The cartridge includes a container and attachment device, which positions the container in proximity to the transducer. The attachment device engages the container with the transducer so as to affect the electric signal created by the instrument. The cartridges and container can be either integral or interchangeable to vary resonance materials to the transducer. The container may be filled with another material, including ferromagnetic fluid for an induced magnet effect upon the perceived sound from the transducer.

Abstract: The present invention is a pickup system including a transducer, a mount, and a cartridge for modifying perceived sound from a musical instrument. The transducer includes a housing, a magnet and an electric signal carrier. The mount attaches the transducer to the instrument. The cartridge includes a container and attachment device, which positions the container in proximity to the transducer. The attachment device engages the container with the transducer so as to affect the electric signal created by the instrument. The cartridges and container can be either integral or interchangeable to vary resonance materials to the transducer. The container may be filled with another material, including ferromagnetic fluid for an induced magnet effect upon the perceived sound from the transducer.