Hi, I'm the new guy. Several months ago, I upgraded my Sennheiser HD 515's to 598's. They sound great compared to the 515's. Recently, I've noticed pretty bad distortion mostly in the low end but also a bit on mid/high peaks. My main receiver is a Marantz 2252 without a headphone amp. I've compared with 3 different amps, the 515's and different formats. It's definitely in the 598's. Would a headphone amp help or could these be defective? Is the low inpedance a possible issue with certain receivers? What would be a good match in a headphone amp for $100-200? Thanks for looking!
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4/10/14 at 4:48pm