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Interesting

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In Reply to: RE: I'm preferring the EH 6CA7 posted by AbeCollins on March 06, 2023 at 07:31:44

I just swapped the JJ 6CA7s in and have listened to one album only as of now. My initial reaction is very positive. They sound more robust and linear than the JJ EL34IIs and better overall if not quite as sweet. I'm not noticing a lack of high end detail, but they are darker. Of course that's JJ to JJ. And with Heresys. I don't have other brands to compare to in the EL34 family. Next will be my thoughts on the EL34IIs in the ST-70.
I'll listen more, but so far I feel like I'd only change back to KT120s (or 6550s or KT88s) to preserve tube life and not for sonics.
EDIT: My tubes have now burned in for over a week of fairly frequent play time.
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Edits: 03/07/23 03/07/23

Follow Ups:

RE: Interesting - AbeCollins 13:52:51 03/09/23 (0)
My comparison may be a little different than yours. In my case:

- JJ 6CA7 vs EH 6CA7 vs Tong-Sol KT120

in the Rogue Cronus Magnum. I had the JJ 6CA7 in the amp for only a couple days then switched back to EH 6CA7 for a few days. I'm going swap the JJ 6CA7 back into the amp and listen to those for a few days. They DO sound good but my initial impression was that they were deep, richer, darker, not quite as detailed and softer up top. I'll give the JJ more break in time and see if my findings hold true.

And then there's the KT-120. I'm hesitant to go back to those as the 6CA7 tubes are sounding so nice!

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