The Dayton Audio SPA1000 is one of the most technologically advanced subwoofer amplifiers on the market. It is based on a Class G circuit combining the high power and fidelity of a Class AB amplifier with a patented power supply to achieve an incredible 86% efficiency. The SPA1000 offers the efficiency of a Class D system without compromising on audio quality. The Class AB output stage provides very low distortion for pure sound, without the jitter problems found in many high-output amplifiers.

The SPA1000 is an American-designed, patented circuit that constantly monitors the input signal to modulate or control the voltage available at the output stage. This tracking capability allows the SPA1000 to deliver exactly the power required, without creating a reserve, so that the output stage has the necessary power available at all times. As a result, less energy is dissipated as heat and more power is available to power your subwoofer. With its advanced thermal management, the SPA1000 offers a real improvement over previous models, making it a foolproof amplifier choice for demanding audio applications.