Check the listing for details. Stetsom STX 2848 DSP Digital Signal Processor 8 Channels Crossover & Equalizer. Condition: Open box. Listed at 89.96 USD. The Stetsom STX 2848 DSP Digital Signal Processor is a high-quality 8 channel crossover and equalizer designed for car audio systems. With its advanced technology and brand reputation, it offers premium performance for enhancing sound quality in your vehicle. Whether you are looking to adjust the frequency response of your speakers or create a seamless audio experience with multiple audio sources, this digital signal processor from Stetsom is a reliable choice for audiophiles and car audio enthusiasts.