[Sonido]

I know longer lengths of cabling lowers sound quality in general, but it's still way above current wireless technology in terms of sound quality? For example 10 meter 1/4" extension cable on Sennhesier HD 600 vs Sennheiser RS 220 from 10 meters away. Which one would win?

 

[Speedskater]

The same one as at 1 meter away.
The difference between models is way greater than any cable differences.
The differences between two of the same model but manufactured on different dates or batches is also probably greater than the cable differences.