The SA2-50 Shim Amplifier is specially designed to drive Magnetic Resonance Imaging (MRI) system magnet shim windings. The SA2-50 provides high fidelity reproduction of command signals, quick response to load disturbances, excellent thermal stability, high-reliability, and low cost of ownership. The SA2-50 is fabricated on a single printed circuit board and is designed to operate in a controlled equipment room environment.