UltraMEM significantly enhances your Kurzweil K250 synthesizer by delivering the maximum memory expansion available, unlocking its full potential. This advanced upgrade allows for increased sample storage and more complex sound programming, enabling you to push creative boundaries. Designed with precision, compatibility and originality in mind, UltraMEM integrates seamlessly with your K250, ensuring stable performance and reliability. 

Kit Includes:

• UltraMEM board
  
• Pre-measured jumper wires
• Reset connector with pre-measured wires
  
• Selector switch mini-boards
• 8gb Micro-SD flash card
• Mounting strip
• Ribbon interconnect cable

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‍UltraMEM: A massive 24MB battery-backed SRAM expansion providing up to 14 sound block locations* (*12 without UltraROM). This breakthrough allows users to load all ROM-based sounds that were ever available for the K250, plus new sounds never before possible. Unlike the original K250's volatile sampling RAM, UltraMEM ensures your samples and sound files are retained even when the machine is powered off, eliminating the need for tedious backups and restores between sessions. The system includes microSD backup and large sampling banks without compromising resident sounds—solving the historical limitation where ROM daughterboards and SuperRAM sampling memory couldn't coexist. Sounds can now be changed and upgraded by USB files. The K250 will look like a mass storage device to a modern PC or MAC.

‍Professional-Grade Engineering

The UltraMEM and UltraROM use Field Programmable Gate Array (FPGA) technology combined with ARM Cortex M33 CPUs to pull off this feat of engineering. Both the FPGA and CPU firmware can be updated with simple drag-and-drop of files into a folder on the K250’s new mass storage.

Professional Installation Available

For those who prefer professional installation, we offer a list of service centers equipped to handle the task. Alternatively, you can send just the CPU and CGP (sound ROM) boards instead of the entire K250, which can help reduce shipping costs.

‍Comprehensive DIY Installation Support

Each upgrade kit includes comprehensive step-by-step guides and detailed tutorials designed to walk users through the entire installation process with confidence. This professional approach ensures that K250 owners can successfully implement these advanced upgrades regardless of their technical background.

It is recommended to use a magnifying glass or a head mounted magnifier to ensure good solder joints.

Using a multimeter is highly recommended to verify that the switch boards are installed correctly after soldering.

DIY Time Estimate
Under 2 Hours

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$395.00 USD