Sequential Circuits Prophet 2000 ROM 4.3B Firmware Upgrade Chip / New EPROM

Sequential Circuits Prophet 2002 ROM 4.3B Firmware Upgrade Chip / BrandNew EPROM

*RARE *ORIG Sequential PROPHET 2002 12bit ANALOG FILTER SAMPLER Brochure Catalog

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Kurzweil K2000 3.87C "Calvin" FW EPROM OS upgrade ROM

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EPROM extension PCB ONLY 2764 27128 27256 27512 27c128 27c256 27c512 Drumulator