This project aims to build a practical single-stage headphone amplifier using the CMOY architecture to amplify common audio signals for use with devices like Apple EarBuds. Our team selected a non-inverting amplifier configuration using the OPA1656 op-amp, along with dual BUF634A buffer stages for better current drive. The CMOY amplifier, originally designed by Chu Moy, is known for its compact layout, clean audio performance, and accessibility for beginners. Our main tasks included drafting the amplifier schematic based on the CMOY design, verifying functionality through simulation, assembling the circuit on a Printed Circuit Board (PCB), and testing the final build with an oscilloscope.