Check the listing for details. Stetsom STX2448 DSP Crossover and Equalizer 4 Channel Full Digital Signal Proces. Condition: New, Made in Brazil. Listed at 71.20 USD. ***The item is still in it's factory seal wrap, but the box has some wear signs*** ☆☆☆The instructions come in Portuguese, you can find them in English on the internet ☆☆☆ The Stetsom STX2448 DSP Crossover and Equalizer is a 4-channel full digital signal processor designed for car audio systems. This product, manufactured in Brazil by Stetsom, offers advanced equalization capabilities to enhance the sound quality of your audio system. With its digital signal processing technology, the STX2448 provides precise crossover and equalization for a custom audio experience in your vehicle.***