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In the Forum: Horn-Loaded Speakers
In the Thread: Designing and building a 5 channel horn loaded (looking for directions on my way)
Post Subject: First results of my experiencePosted by kodomo on: 8/29/2016
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The reticulated foam makes a difference and that is for sure. However it does lower the output. From about 1db up to 2.5db! depending on the amount you put inside your horns.
Is it transparent? It is not, as it creates and audible difference even if you lift the driver/horn combination back up to original level (level before installing the foam)
Does it eliminate homs (higher order modes as named by Geddes) or works in some other way? Well, I can not say and homs is a subject that people debate on its existence. However for me it is more like the sound loses its breathing space. Like treble ambience. If the system is not tuned good, if it sounds overly bright or something like that, these may tame, but for my system this seems like a worthless addition, as the system is not shouty or edgy. The system only exhibits this kind of edgy behaviour if the actual recording is made that way and I would maybe keep these for sake of listening to those recordings 
I have tried varying depths and levels on horns and will continue to do so for another month before finalising my views. These may work wonders for some poeple who push their horns capacity too much (further than 3db) or people who use edgy TAD or BMS drivers Rerurn to Romy the Cat's Site