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Euthymia ICBM op-amp swap


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When I was playing around with the op-amp in my Blue Boy I kept the other op amps, but I don't actually own an ICBM yet.


I have a LM833 and one other I tried in the Blue boy in place of its 4558. Without the 4558 the pedal wasn't as compressed with a slightly smaller midrange emphasis and more growl.

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