Manley Chinook Owners Tube Rolling

This power cord will knock your socks off for little money:
https://www.ebay.com/itm/253018874722
It's great for detail, dynamics and blackness.
If you prefer a little warmth, there is this one.

Sorry Lew, you are wrong on this one. Or, you're right. Maybe you've not experienced the improvements wrought from alternative tubes. Or maybe it's no big deal to you. Or your gear is so incredible that mere changes in tubes yield no gain. But from my experience, it is night and day.

@fruitloopsr Yes, I use them. I only recommend stuff I've heard and/or used.  Rhodium on phono preamp and gold on subs. OFC copper and well made. A big improvement over stock. I keep meaning to add them to my monoblocks but they are hard wired. A rainy day project.

Yes, it will make a difference.
Knock yourself out
I'd start with the Telefunken ECC88.

Partsconnexion
I got mine here. Huge upgrade.