Hello Rafael,
Very sorry for the late answer.
From what I can see on your pics, the CC (EL34) has an auto bias circuit. That is a great thing.
My CCQ had adjustments screws inside to adjust the bias.
I loved them but this bias adjustment made me tired.
And I found a better sound to my ears with 300B WE monoblocks with an auto bias design so I sold the CCQs.
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There are two means of refuge from the miseries of life: music and cats
Albert Schweitzer
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