Selling an excellent pair of HD600 modded with custom cans copper mod (the extra tuning foams included with ported foam installed). Comes with custom corpse cable terminated in XLR as well as xlr to 1/4 adapter. Also comes with a new pair of ZMF perf lambskin pads as well. Comparing modded vs stock I really feel there is such a minor difference it didn’t matter to my taste, but found the mid foams with the 3 stamped on was equal to stock form with the ported adding more detail to the bass notes (texture) but not really changing the original sound signature (possibly smoother overall).