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Column PA Loudspeaker Cabinets (Nondiffracting)



Column Loudspeakers are designed around improving voice coherence and intelligibility.  Consequently, Column Cabinets are among the strongest candidates for using diffraction reducing cabinets.

Yet, no company produces cabinets with shapes which will reduce diffraction in the frequencies column loudspeakers are focused on... voice coherence and intelligibility.  US Enclosure can produce them with mass manufacturing and with the same wall material characteristics as wood cabinets, at close to the same cost- in the USA.

The August 2017 Live sound Magazine article titled "Expanding Horizons" has 22 featurettes of Column PA Sound Systems from 21 major column loudspeaker manufacturers.  From this article the following picture emerges of "typical" Column PA unit.  [Not all systems use all driver types listed.]

Cabinet Width of 5 to 6 inches
Driver Type    
Driver Quantity
Driver Diameter



High
11
1 inch
Midrange
13
4 inch
Full Range
13
3 inch
Low
7
6 inch
usually in a larger bottom cabinet


US Enclosure suggests the following design changes to improve diffraction levels:

The Front View has the cabinet  look like a tube but with little diffraction compared to all available major column loudspeakers.




The Top View for the cabinet shape geometry is based upon a shape named “Moss's Egg”.  Many other curved shapes could be used.. The dark line which is the front side of the top-view image would be about 4 to 6 inches wide and the shape could be widened toward the bottom of the cabinet for low frequency drivers while maintaining complex curved shape. 



With a 5” wide front wall, using the Moss's Egg geometry and a tube shaped front-view, acoustical physics states that diffraction effects would be lowered or eliminated down to 338 Hz..  Benefit is even cleaner and more open sound without diffraction created or influenced soundwaves.

Compare this performance to a fairly typical 0.25 radius corner with flat wall panels at diffraction reduction at about 5700 Hz.





We provide the nondiffracting blue line for your cabinets.  We are here to increase your company sales.