Do you run a high end power cord on your sub?


I have a Rel B2 sub in my system, and have never really bothered with a decent power cord for it. I have an "Iron Lung Jellyfish" power cord, which is better than a stock cord. It is a $30 cord but is actually suprisingly good when you are just "testing the waters" of what power cords can do. I am considering something better, but not sure if this is the best place to spend money? What are your experiences with upgraded power cords for subwoofers? I am thinking about an Audience Powerchord e, as I use Audience power cords on my other components.

Other components in my system:
Thor Audio TA-1000 mk II preamp
BAT VK-55SE amp
Hyperion HPS-938 speakers
PS Audio PWD mk 2
Audience AR6T power conditioner and power cords
Nordost Heimdall IC's
Anticables speaker cables
mekong56
Audioquest Europe arranged the new Wild Dog pure silver interconnect for me. One week ago Audioquest America had the parts ready for this new top model subwoofer cable. I will receive it soon. I will write a review about it as well.
I noticed an improvement in sound quality with upgraded PC's on my JL f113's while listening to 2 channel music. For HT (movie effects) I don't notice that much of a difference.
I don’t think a higher crossover is any help in a 2 channel system. My RELs are crossed at 22 Hz. Not being able to do a 140 Hz is of no concern to me and my system.
And by the way the poor old RELs seem to make pretty good music better than a lot of the new stuff out there. Most of the new stuff is too boomy for music.
Faster respons of the units is the key to better integration. Till 2012 I used to max 80hz. In the past I sold many many Rel subwoofers. You could not use them to higher freq. They did not have the control and speed to be used this high. After I got information that higher freq. would give a better result I tried it out. I was surprised how much better the integration became. I started with 100, 120 and ended at 140 hz.

More speed means better timing, more control and better integration. I play about 80-90% stereo. Most tests are done at stereo use.