Your estimate is just about right on. I bought a "maxxed out" built by Kevin a few months ago. He told me the big Cardas caps take the longest--100 hours or more--to fully settle in, and that was pretty much my experience. But the great bass you mention was there from the start, as well as the rich, realistic timbre. Highs became increasingly open and delicate as burn in progressed. Enjoy!
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