(06-Aug-2018, 11:26)Greg Wrote: RebelMan’s main argument is fundamentally wrong. I have compared 120, 220 Pro C/I and 250 Pro C/I in my listening room, in every case using the same source and speakers. The amp changes were made and listenened to immediately. I and my friend could clearly and instantly identify an incremental improvement to sound as the change up through the amp models was made. Having a relatively small listening room, I was not expecting to detect a difference between the 220 and the 250 but it was clearly evident in terms of transparency, revelation of detail and smoothness of presentation. The result being my wallet is somewhat lighter having upgraded to the 250.
A few weeks ago I met and discussed this experience with Mathieu Pernot, Devialet’s Chief Engineer and principle designer. He stated that improved audio performance of their amps was a reflection on the quality of components used in construction. The higher the model in the hierarchy, the better the quality of components used, including heat sinks.
Disregarding subjective sound impressions for a moment, here is an objective example of how the sound improves in the higher grade models. Compare the phono stages of a 220 with a 250. The 250 is quieter than the 220. The noise floor is quieter because there is less phono roar, particularly noticeable with low output mc cartridges.
Please elaborate on the conditions of your analysis. For instance, how do you level match the amplifiers? What sources did you use? How were the samples administered? What data did you collect? Are you conclusions only subjective?
I am giving you some benefit of the doubt given the mix of Expert and Expert Pro's that were used. You should reread my post though.
"Dream as if you'll live forever. Live as if you'll die today."
