|I found the HD600 stock cable to have a fuller and richer sound than the HD650 cable|
This is really a first for me about the stock 600 sounding "fuller" than the stock 650 talk about a wrench in the mix! oh well...to each his own!
(Even Sennheiser says the 650 cable is better; it just makes common sense that a thicker cable using the same type of copper wire would offer less resistance, even over ten feet. But hey, whaddo I know?)