大器

very capable person / precious object

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

device / tool / utensil / CL:臺|台[tai2]

amplifier

lit. it takes a long time to make a big pot (idiom); fig. a great talent matures slowly / in the fullness of time a major figure will develop into a pillar of the state / Rome wasn't built in a day

series amplifier

instrumentation amplifier

analog amplifier