I just went through this analysis myself recently. I had been using 2 Hydra 2's (240V versions) to feed my two Linn Klimax Solo 500W monoblocks using Anaconda Alpha powercords. I went the 240V route because to my ears the amps sounded better in that set-up.
Recently I bought a darTZeel power amp and decided to reassess the most optimal power delivery. Initially, I went straight into the wall in 120V mode and then I reinserted the Hydra 2. Almost didn't even need to go sit down and listen the improvement was so immediate. Then I decided to try the Hydra 8 in place of the Hydra 2. An immediate and very audible further improvement. Sold me immediately and I have since ordered a 240V Hydra 8.
Then...I decided to try the new Helix version of the power cords...all the store had to demo was the Python Helix. This model bested my non-Helix Anaconda's and accordingly I have ordered new Anaconda Helix's for my amplifier and front end equipment. The incremental performance of the Anaconda is probably best extracted on high current devices like amplifiers.
Recently I bought a darTZeel power amp and decided to reassess the most optimal power delivery. Initially, I went straight into the wall in 120V mode and then I reinserted the Hydra 2. Almost didn't even need to go sit down and listen the improvement was so immediate. Then I decided to try the Hydra 8 in place of the Hydra 2. An immediate and very audible further improvement. Sold me immediately and I have since ordered a 240V Hydra 8.
Then...I decided to try the new Helix version of the power cords...all the store had to demo was the Python Helix. This model bested my non-Helix Anaconda's and accordingly I have ordered new Anaconda Helix's for my amplifier and front end equipment. The incremental performance of the Anaconda is probably best extracted on high current devices like amplifiers.