Since we are on a topic of replacement cables, I figured to post my mini-review of Lunashops replacement 7N OCC silver-plated cable for Audio-Technica ATH-M50x headphones.
http://www.lunashops.com/goods.php?id=4612
When it comes to full size headphones, there isn't too much you can do to fine tune the sound unless you find replacement pads (not always available) or go for a higher quality replacement cable. Typically OEM chord uses a standard copper or OFC wires. To improve sound quality, you have to look beyond copper wired cables where silver-plated wires is a great alternative. Those cables don't magically improve the sound, but rather a higher purity of silver-plated wire in comparison to a regular copper will improve conductivity and reduce degradation of the signal. The level of such improvement will vary depending on purity of the wire and quality of the connectors, but sometimes you don't need to spend hundreds of dollars for super-duper wires to get a benefit of noticeable sound improvement.
I have tested a lot of lunashops replacement silver-plated cables, and always find the same consistent improvement in performance which brightens the sound, makes it more detailed in upper mids/treble and a bit tighter at low end, and slightly widens a perception of staging as a result of brighter sound. With M50x this replacement cable introduced the same level of sound improvement. But you might ask, what makes this cable special? We are talking about 7N (99.99999% purity) OCC silver-plated quality cable that will actually improve a sound of M50x, not some cheap ebay cable with a color jacket to use as an accessory for your headphones. It is thin and flexible, and has a great build quality
Overall, for under $40 you get a durable replacement cable with a very high quality and purity silver-plate wiring to be used with ATH-M50x twist-on connector. The obvious benefit is a sound improvement, though it will come at a cost of some microphonics when cable is rubbing against your cloth, but a benefit of sound improvement outweighs it.
Here are the pictures.