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RE: 12ax7 for ARC SP16

Posted by Mechans (A) on October 6, 2011 at 06:30:27

In Reply to: RE: 12ax7 for ARC SP16 posted by JJ Triode on October 4, 2011 at 08:59:59:

My experience with rolling tubes in an ARC pre proved to me that I could do almost nothing to change the "gain from hell" using various 12--7 tubes. Indeed the first position in the three tube chain had the most noticable imoact on tone the other ttube seemed to have akmost no real impact. I happened to like the original OEM old stock tubes which were made for ARC by BEL of India. I also found that using 12AU7s did something which seemed to result in an awful lot of woofer travel and didn't sound any better but scared me.
5751s are usually my favorite 12AX7 type and worked out OK but the real "High Definition " signature ARC sonic was best heard using 12AX7s. I stopped using it in favor of a 6SN7 pre and left more than decent sounding Shuaguang 12AX7C9s and regular new production Tung Sol 12AX7s in it.

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