The Miller SI-116 Sound Interstage IF Transformer is a high-quality component designed for radios and other audio equipment. Made in the United States, this transformer offers a frequency of 4.5mHz and multiple impedance options of 4.7 Ohms, 6.2 Ohms, and 8.1 Ohms, ensuring versatility in various audio applications. Perfect for collectors or enthusiasts of vintage radios and audio equipment, this transformer provides a reliable and efficient solution for enhancing sound quality and performance.