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EI 6CA7 Fat Bottle burn-in time

I am currently using a quad of those tubes in my Marantz 8B. While having good extension at frequency ends, I somehow prefer the smooth, creamy mids of my cryo Valve Art EL34s. So is this 'cooler' tone a characteristic of the EIs or do they need a very long burn-in period (they have been used for more than a week by now)?
Any feedback will be appreciated - thanks.

Wolfram


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Topic - EI 6CA7 Fat Bottle burn-in time - dubai2000 03:48:26 09/19/04 (6)


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