Power cord for tube preamp w/SF Cremona Auditors?


I've recently been agonizing on a power cord for my Apex Pinnacle Preamp/Headphone amp. As a preamp, the original Shunyata Anaconda Alphas are perfect, just mellowed out enough up top to take the brashness off my Sonus Faber Cremona Auditors' tweeters, making these speakers sound magical, and the bass is nice and controlled.
Unfortunately, the bass is too soft with this cord for headphone usage.

I have tried these cords, and none sound as perfect a match for the speakers as the Anaconda Alphas, as they all sound a bit fatiguing or forward or brash:
Shunyata Anaconda CX,
Stealth Dream (preamp version),
TG SLVR & 688s,
Telwire.
I think there is some synergy going on with the (same generation) Shunyata Anaconda VX on my EMM XDS1 cd player.
rgs92
Thanks for the kind words Lloyd, I appreciate it.
I do have 650s, but also HD800s and Beyers & Denons.
The 650s (& previously 600s) were my mainstay for several years.
Grados are just too raw-sounding for me.
These headphones have fine bass (and in fact all sound fine) with some of the other power cords. It's just that the only power cord that works really well with the speakers messes up the bass with the phones. That is why I was focusing on maybe finding a power cord that would be the best of both worlds.
Thanks again.
As long as the power cord is rated to carry the maximum load from your component, and is properly wired, grounded and shielded, it should not Color the sound of it. Pop the cover off your unit and take a look at the power supply and the iec inlet. You'll be shocked to notice how unsubstantial it looks.

You would be better served by utilising a isolation transformer between the wall and your unit. Power cords really are a non issue. And a source of tremendous profits for the people that peddle in that mythology.