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Firmware for the Digital Preamplifier/Crossover This ZIP package contains various pieces of software required for the Digital Preamplifier and Crossover, including: The HEX file to program the microcontroller Source code to build that HEX file The USB interface driver The DSP source code Cat No SC3415. Price: Free Files: Digital_Preamp software.zip (ZIP contains .hex file and source code; 9.2MB) Related to: Project: Digital Preamp & Crossover (October 2025 [print issue] [online issue]) Project: Digital Preamp & Crossover, Pt2 (November 2025) Other items relevant to these projects: Digital Preamplifier main PCB [01107251] ($30.00) Add to trolley Digital Preamplifier front panel control PCB [01107252] ($2.50) Add to trolley Digital Preamplifier power supply PCB [01107253] ($7.50) Add to trolley PIC32MX270F256D-50I/PT‎ programmed for the Digital Preamplifier/Crossover [0110725A.HEX] ($20.00) Add to trolley Digital Preamplifier/Crossover PCB patterns (PDF download) [01107251-3] (Free) Add to trolley 3D printing files for the Digital Preamplifier/Crossover (Free) Add to trolley Digital Preamplifier/Crossover case drilling diagrams (Free) Add to trolley