DESC: The gold-anodized fascias immediately declares that the AD-500 Series is special. Precision machined from 10mm thick aluminum, it not only looks sleek and gives a sense of solid permanence, but also ensure rugged durability. Underneath the exterior you will find the finest audio technologies. The AD-500 features a 1-Bit dual D/A converter, random memory programming, multi-function FL display and IC logic control system. The AD-500 will deliver all kinds of music with the utmost fidelity and a first class performance.