Yes, I've noticed it as well and am glad of the explanation. The hiss is not always there ... maybe the thing turns off after time, or perhaps it makes a difference how the iPod is turned off?
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iTunes -> USB -> Micro DAC -> ALO Jena Cryo m2m -> Micro Amp -> AKG K 701
iPod Classic -> ALO Jena Cryo LOD -> Micro Amp -> Shure E4c
Recent Obsession: Umphrey's McGee (You have to hear this band if you haven't already!)
Selected Rock: Ben Folds, Sufjan Stevens, Frank Zappa, Grateful Dead, Richard Thompson, Phish, Ani Difranco, Tori Amos, Kate Bush, Peter Gabriel, Roy Harper
Selected Classical & Jazz: Shostakovich, Steve Reich, John Adams, Sorabji, Mahler, Arvo Part, Keith Jarrett, John Zorn
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