I tested the modifications with my DIY pocket headphone amplifier (shown above), the Musical Fidelity X-Cans (v.1) headphone amplifier, Sennheiser 465 and Sennheiser HD600 headphones and the Stax SRS-3030 electrostatic headphone system.
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at
, Added: 11 Sep 2007
http://headwize.com/projects/showfile.php?file=cmoy1_prj.htm