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12au7 / 5814 tubes for preamp audition

I'm going to be auditioning a Backert Labs Rhumba 1.2, This will be
going head to head against my Juicy Music Audio Peach 2 which Bob is
in the process of repairing. I had the opportunity to hear the 1.2
when I dropped the Peach off at his shop. The Rhumba was thoroughly
impressive in it's speed, impact and overall presentation, while still
having the "soul" that one chooses a tube preamp for.

The Rhumba uses 12au7's and comes with a pair of JJ's. I would like
to level the playing field so to speak. I have run about 25-30 pair
of new production and NOS tubes thru the Peach and have long since
settled on a 6h30dr and a pair of 7L3 or 7L4 Heerlen E88CC's.

I will have 14 days for my little competition and need to think
tubes now so I'm not wasting my window. I've done a lot of research
already and have located a pair of 1955 RCA 5814 3 mica blackplate
D getter . I would like some additional suggestions. I have never
had any luck with new production tubes either in the Peach or in the
CAL Audio Alpha or Sigma 2 which I have owned previously so I'd like
to keep this focused on NOS. Any guidance is sincerely appreciated.

Thanks, Woody

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Topic - 12au7 / 5814 tubes for preamp audition - wood1 10:38:03 04/16/17 (10)


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