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In Reply to: RE: Measurements on 1.7, 3.7 and 20.7 posted by Davey on September 26, 2014 at 17:03:55
I am not going to say that the actual sensitivity is 77 db and change, but I know from listening that it is lower. We compared them in the same setup and position with the same equipment and they produced lower volume but more substantial bass. When the dealer was done setting up the 20.1 (was a new model then) he set the vol. at 59 on the preamp which is the volume we were listening to with the 3.5 (IIRC) later I found mysef listening at 63 most of the time, but that was louder than how I played the 3.5. So I would guess that the sensitivity difference is something like 2 db. Could be as low as 1 db difference, but I don't think I would have picked up on that small a difference so readily.
Follow Ups:
In case you fellas haven't deduced this yet, I'm asking these devil's advocate questions to try and help you understand how difficult it is to characterize and measure these speakers.....for the German guys.....and even for Magnepan.
You don't mention whether the numerical readings on your preamp correspond to relative db levels. So, there's yet another confusing data point. :)
Dave.
I can't afford the white goods from Boulder. The blue flourescent display was on the dealer's preamp. Those are usually in 1 db increments. But I don't know that was the case, I never asked.
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