Speaker cables make a difference, interconnects make a difference, etc, i fully agree.
But... how fascinating this is!! your sub's playing 20 to 60hz (mas o menos)? depending on where your crossover's at....and yet you changed a subwoofer's power cord and perceived a great improvement in "detail", huh??
Try again.....Turn your speakers off/unhook them and just have subs playing for a bit...wooomboomwoomboom it goes and that's all you're gonna hear for a bit. Now, swap the sub's power cords back and forth and let us know if you reeeeeallly perceived an improvement in "detail" or not!! i.e., an improvement in the 20 hz to 60hz woomboomboomboom detail!!!
Besides that, you have some nice speakers, the Voxativs, designed by a very smart engineer. Ms. Adler is very cool.