Amplification/(扩声) -> Sound Production and Manipulation [SPM]/(制作与处理)

Amplification/(扩声) -> #[Tier 5] Basic Tools for Production/([第五]基础工具层为制作) -> Users Group/(用户群)

Amplification/(扩声) -> Audio Engineering/(音响工程) -> Technique/(技能) -> Step 3 Undergraduate/(第三步大学) -> Years Group/(年级群)