MRC…Technology. Perfected. The Road to Leadership In the hobby industry, few companies have built as bold and dynamic a reputation for quality products and technical achievement as Model Rectifier Corporation. More than a half century ago, MRC began its march toward hobby product leadership by designing model railroad train controls with a level of realism and power previously unavailable. Today, MRC's technology-rich Tech 6 and Prodigy DCC lead a long list of MRC engineered train controls and sound systems respected and enjoyed by millions of model railroad hobbyist around the world