Ed,
I love my TWL power cables! Yes, not sure what's going on, but all my SE amps seem quieter to me as well.
Give them some time too -- they will probably go through some weirdness in the 10-25 hour range and then will settle into a very balanced, smooth sound.
I tried them on my paramours, paramounts, Fis and Carina and all amps really benefitted nicely from them.
And Pete is another of the real great guys in this whole audio thing.
Hopenefully my next one from him will be an 8 gauge cable 20 amp cable for my Rev B buss.
-- Jim
Jim Rebman -- recovering audiophile
Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).
s.e.x. 2.1 under construction. Want list: Stereomour II
All ICs homemade (speaker and power next)