The Dayton Audio DSPB-K DSP and DSPB-KE preamp bundle adds powerful DSP processing and quick connectivity to any amplifier or audio project! It’s preconfigured to adjust high / low pass filters and gain settings with the onboard potentiometers, but unlock its full potential by combining it with the Dayton Audio ICP1 (sold separately). Explore almost limitless possibilities of precise EQ, filters, bass processing, time alignment and so much more with the SigmaStudio development tool. Stacked together this package is still smaller than most passive crossover circuits, plus it adds all of the RCA and 3.5mm connections appropriate for making a 2.1 system.