Headphone cable, what do you do?

I hope it is not just me but none of the headphones I have owned over last few years have long enough cable to reach from my headphone amp to my normal listening, lounging seat.

At present I have been using a fairly cheap 20ft extension cable I purchased off eBay but upon reflection could this be degrading the sq?

Surely I am not the only one in this situation so my question is what do you do? Your solution?