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In Reply to: Re: 5751 in CAL Sigma II Dac? posted by SR on October 3, 2000 at 13:42:11:
I've ungraded the stock tubes on my Alpha with Tele 12ax7's but found that they sounded a bit "dark". I then replaced them with Sylvania 5751's Gold Brand/gold pins. The soundstage is much deeper than the teles, the mids were incredible. Also, the noise floor dropped. The DAC sounded like a entirely different unit. I would highly recommend these tubes. But to answer the question, yes the 5751's is a suitable replacement. They have a lower gain than the 12ax7's, 70 vs 100. Hope this helps.
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- Re: 5751 in CAL Sigma II Dac? - atoz 10:00:02 10/12/00 (0)