The present invention utilizes switching power amplifier technology to improve the performance of self-amplified speaker system. In contrast to analog Class A and Class AB amplifiers, the present invention utilizes a digital class D amplifier. Class D amplifiers are a pulse width modulated or digital switching amplifier configuration. The Class D amplifiers of the present invention includes 2-pole compensation feedback and power supply tracking that improves stability and total harmonic distortion over conventional power amplifiers. Class D amplifiers have an average electrical efficiency value of at least 65%. This level of electrical efficiency leads to reduction in the amount of power lost in the device or systems that result in heat generation. More specifically, the present invention utilizes Class D and other switching power amplifier topologies; amplitude scaling; and 2-pole compensation to increase electrical efficiency and physical operating range; and to reduce power supply requirements, heat generation and physical size of self-amplified speaker apparatus and systems. These design characteristics of the present invention provide speaker systems with the capability to operate with less total harmonic distortion and extend the operation range to at least twice the geographical distance or utilize at least twice as many self-amplified speaker systems.