ZXY3012 Permalloy Audio Isolation Signal Transformer DIP Through Hole for Hi-Fi Audio Equipment The ZXY3012 Permalloy Audio Isolation Signal Transformer is designed for Hi-Fi audio equipment and professional audio applications. With a high-permeability Permalloy core and DIP through-hole design, it provides reliable signal isolation, low noise, and stable audio performance. It is a cost-effective alternative to comparable audio transformers from well-known brands such as