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In the Forum: Horn-Loaded Speakers
In the Thread: Big mama 1.5" horns....
Post Subject: Damping thin horns + exterior reflectionsPosted by NBC on: 9/9/2006
Hi Guys,
An idea I've had for damping thinner horns in a more or less aesthetically pleasing manner is to house the horn in a Sonotube rigid cardboard cylindrical concrete former, and then apply the desired damping material inside the Sonotube.
This could be done in such a way that the modification is reversible, with the horn staying in more or less intact condition. For instance, a thin sleeve material could be overlayed onto the outside of the horn body before the damping material is applied, poured or sprayed.
The only possible downside I can foresee is that the straight-sided cylindrical profile will interact 'differently' (not necessarily worse) with the nearby drivers. For example, with a significantly shorter acoustically time-aligned tweeter or midrange horn, the sound will hit the first reflection surface of the adjacent longer/wider cylinder-encased horn. Even without such an enclosure and using just a naked horn, however, there are still first reflection points off the longer/wider horn(s) to deal with, albeit with a different, less uniform pattern of first reflection points.
The Le Cleac'h horns have very large diameter mouths, presenting an additional challenge in terms of dealing with the *inter* horn first reflection points in acoustically time-aligned Multiway horn systems. Whilst minimizing these first reflections off the long horn body and large bell via increased inter-horn spacing, center-to-center distances between the horns may increase the distance at which the system can become integrated into a convincing homogeneous point source.
Neil Rerurn to Romy the Cat's Site