Quietest BUDGET high-current power cord?

spend your money on something that will really effect the sound, like better components.

Now that you have established a budget of $500, I once again highly recommend a DIY Acrolink 6N-4030 cable with Furutech connectors.

Brf, the Acrolink wire is $145/meter. 3 meters = $435 = little-to-no money left over for four plugs...

I would look at Blue Circle BC62's. They kick ass on monoblock amps here. Bettered Tg SLVR's, Audience PowerChord, Shunyata Taipans, JPS AC+, Cardas Golden Ref... Only on the amps though. The BC62's do not get a lot of publ. but do no harm, as I hear it. Like some here, I prefer a few different cords on preamps, digital, and phono...

But on the amps, they get the Timbre, PRaT, stage... just right. full bass too (and upper/midbass).

You state that you want absolute silence from your power cords.

Do you have noise in your system now that you expect to ameliorate with power cords to your amps?

Do you have experience with other power cords not being absolutely quiet, and that you can trace specifically to the power cords and not to another element of your system?

Have you treated your power at the source...like with a whole house power filter at the breaker box?