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12AU7 as a buffer - suggestion of brand/model.

Dear Sirs,

I am using a commercial preamp the line stage of which is nothing more than a pot followed by an 12AU7 wired as cathode-follower.
The original tube is unbranded.
The sound is natural but soft and weak on bass.
I tried a Telefunken 12AX7 (ok is not the same tube) and the sound is stronger, clearer but also it seems a little distorted.
So I am here to ask:
1) could some run in improve the sound with the Telefunken tube?
2) should I use a real 12AU7 and which ?
I do not like a too much soft sound.
I like the sound with the Telefunken but as I said I also perceive some distortion.

Thank you very much indeed.
Kind regards,

beppe




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Topic - 12AU7 as a buffer - suggestion of brand/model. - beppe61 23:42:41 02/13/07 (32)


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