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The physics of La Scala IIs and folded horns in general


JFHSQT

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If you read the words in that link above, then I believe that this issue will resolve itself:

 

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The picture below, shows a comparison of in-room testing of the Vittora prototype (labeled GR9) and a stock Klipsch La Scala I bass horn with a K33 woofer.  Exactly the same test was done on both horns, in the same location in the middle of a room at my shop (no walls or corners around either of the cabinets.  GR9/Vittora is the red curve.  Comparing frequency response curves, one can see that in these tests, the LS has a peak at about 175Hz and then the output of bass drops off sharply from there all the way down to 50Hz.   The Vittora curve has a "knee", where the horn is working between 150Hz and 80Hz, before the drop off to 50Hz.   Note:   The Vittora was designed to be used with a subwoofer to handle frequencies below 50Hz.

 

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