The miniDSP Balanced 2x4 is a low cost, low power digital signal processor with a 28/56-bit DSP engine. It provides 24-bit ADC/DAC conversion and balanced audio I/O through terminal blocks. It can be configured through software for applications like equalization, mixing, filtering, and crossover processing through plug-ins. Compared to other DSP alternatives, it offers flexible and affordable processing for audio and AV systems.