Control method and apparatus for a speaker system and a mobile apparatus are provided. In an embodiment, the control apparatus includes a feedback unit, a compensation unit, and a gain unit. The feedback unit, in response to at least one feedback signal from a speaker, is for generating at least one detected parameter. The compensation unit, in response to a first audio signal, is for generating a second audio signal, wherein the second audio signal is generated selectively by compensation according to a first model for the speaker, a first detected parameter of the at least one detected parameter, the first audio signal, and a gain value. The gain unit, coupled to receive the second audio signal and coupled to receive one or more of the at least one detected parameter, is for outputting the gain value and generating a third audio signal according to the gain value.