Extremely compact type power amplifier

The invention discloses an extremely compact type power amplifier. The extremely compact type power amplifier comprises a shell; a component cavity is arranged in the shell; a front panel and a rear panel are arranged on the shell; both the front panel and the rear panel are provided with a heat dissipation hole communicated with the component cavity; an audio basal plate, an electronic component basal plate and a heat dissipation plate are sequentially arranged in the component cavity from top to bottom; the audio basal plate is close to the rear panel; an audio conversion module and an audio output module are arranged on the audio basal plate; the electronic component basal plate passes through the whole component cavity; a power supply module, a transformer module and a rectification filter module are sequentially arranged on the electronic component basal plate; the power supply module is close to the front panel; the rectification filter module is close to the middle position of the component cavity; the