The old volume controls have black resistors and have been rumored to develop pops and buzzing due to contact deterioration, the new ones have blue resistors with stepped attenuators. The older versions were also susceptible to hum, the newer versions have largely ameliorated this problem by a transformer change. I you are still interested, I happen to have one for sale with the MC phono section. It has the latest revisions and updates. Do a search and I think you'll find more discussions about this topic here in Audiogon. Hope this helps. Happy Holidays!
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