Dayton Audio SPA250DSP Subwoofer Plate Amplifier with DSP

The Dayton Audio SPA250DSP Subwoofer Plate Amplifier represents a sophisticated solution for achieving precise low-frequency control and seamless room integration. Designed for custom subwoofer builds and upgrade projects, this amplifier is ideal for home theatre enthusiasts, audiophiles, and DIY audio system builders who demand accurate bass reproduction and flexible tuning capabilities. Its compact plate format makes it suitable for integration into existing enclosures or new cabinet designs, while the comprehensive DSP functionality allows for detailed adjustment of crossover points, equalisation, and time alignment to suit any listening environment.

At the heart of the SPA250DSP is a Class D amplifier topology delivering 250 watts of continuous power into a minimum 4-ohm load, with an impressive 79% efficiency rating and a signal-to-noise ratio of 97.9 dB for clean, low-noise performance. The amplifier features two RCA inputs and one RCA output, alongside two XLR inputs and two XLR outputs, providing flexible connectivity for balanced and unbalanced sources. A USB port serves as a dedicated configuration interface, enabling full DSP programming via the included Dayton Audio SPA250DSP GUI software, which is compatible with Windows systems. The unit measures 262 x 184 x 60 mm with a cut-out size of 235 x 159 mm, and includes an automatic turn-on sensitivity of 3 mV for convenient operation. With its robust feature set and precise control, this amplifier is an excellent choice for achieving refined subwoofer performance in any high-fidelity audio system.