Founded in 1999, Calyx Audio's parent company, Digital & Analog Co., Ltd. (aka D&A) has been providing Class-D integrated circuits to various audio OEM companies. Since 2008, D&A started to make its own high-end audio products with excellent measured performance. Calyx is the result of this effort. Calyx has been tested subjectively as well as objectively under various rigorous circumstances and has excelled consistently. Its digital audio products have received rave reviews worldwide.