So- when I bought my speaker cables a few years ago, Analysis Plus Mesh Oval 9's, the way my system was set up, I needed a 16' pair. My set up is entirely different now, and I don't need more than a 10' run. As I see it, I have 3 options: 1- do nothing; 2- have my cables re-terminated by AP into a 10' pair and a spare 6' pair; 3- Sell my Oval 9's and look for an entirely new cable.
I do like the AP 9's- it's a full and warm cable. Really checks off all the right boxes for me and in the time I've owned them, never been disappointed by their performance. My amp is a Pass X250.8 and the speakers are Revel Studio 2.
I'm in the same situation. I'm just using my 15 foot speaker cables with the excess laid out in a zigzag pattern behind the speakers. I have always heard that you don't want to coil speaker wire as it can add inductance.