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In the Forum: Playback Listening
In the Thread: Dpols?
Post Subject: More about Bob RobbinsPosted by JJ Triode on: 7/19/2020
Bruno,Let me clarify some things. First, I am not making any negative criticism of Bob Robbins or his method. Not having heard a system set up his way, I cannot say anything definite about the results. Also, while I visited Romy twice (in Boston Back Bay and later in Lexington) his "installation" was not in DPOLS at that time (at least he did not say it was) so I am going only on his description of what a DPOLS configuration achieves.

Second, I did not say that attending to bass and center image alone couldn't bring everything else along with it, I only expressed some doubts but acknowledged it is possible. A number of people, including Romy, have talked about using aspects of imaging as a proxy for other things that need to get sorted out in speaker/room setup. Where I see possible differences from DPOLS is in the very different aspects of Sound that Romy talks about (tone color, culturally "load" of music etc) that presumably "exploded" when he hit the DPOLS in his earlier installations, and the extremely different kinds of music he listens to from the "runaway horse song." But maybe there is a common reality behind these methods.

Third, as to the level of precision required in Bob's method, I think in the 2015 lecture he was trying not to make his method sound too demanding to his audience. I imagine if done carefully, especially with a few iterations given that each change affects everything else, even a few millimeters or degrees could well make a big difference. I have observed this myself with some parameters of my own system adjustment process, which has some parallels with what Bob does, though also some differences. 

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