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Digital Preamplifier/Crossover case drilling diagrams A two-page PDF with all the drilling diagrams for the Digital Preamplifier and Crossover. Note that some diagrams are at 50% scale, others at 100% scale. Check the annotations. Cat No SC3366. Price: Free Files: Digital Preamplifier panel drilling.pdf (408.7KB) Related to: Project: Digital Preamp & Crossover (October 2025 [print issue]) Other items relevant to this project: 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 Firmware for the Digital Preamplifier/Crossover (Free) 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