R5609 Anti-Aliasing Filter Replacement module

Here is a modern day, greatly improved replacement for the old Reticon R5609 Anti-Aliasing Low Pass Filter used in the Kurzweil K250 12-channel synthesizer. These R5609 have not been made in many decades and are hard to get. In addition, these original chips were one of the primary limitations for distortion and noise in the K250. MAXIM makes a modern-day part (MAX291) that has been adapted to match the pinout of the R5609 and provides over 20dB lower distortion and 15dB lower noise. Includes one 8-pin socket per module.

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‍Comprehensive Installation Support

Each upgrade kit includes comprehensive step-by-step guides and detailed photo 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.

DIY Time Estimate

Replacing all modules should take 3-4 hours
(repetitive task 12 times)

$29.50 USD ( single module )
$299 USD ( Full set of 12 Modules )

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