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Horn waveguide atop a 4" FR driver?
Horn waveguide atop a 4" FR driver?
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Old 20th September 2019, 10:21 PM   #11
GM is offline GM  United States
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Indeed it is; it in theory has an infinite number of the same eigenmode, so sums as one 'massive' harmonic wave comb filtering with the driver's output. Offset the driver at an acoustic or golden ratio and you have the exact opposite, a very diffuse, low energy 'haze'.

Fine for a flat baffle, not so much with a horn/WG and why foam inserts and/or foam or other damping material around its perimeter is used to damp these, so placing an odd shaped baffle on top of it won't change it, just add some more random eigenmodes to the 'mix'.

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Old 21st September 2019, 07:52 AM   #12
Sub Sonic is offline Sub Sonic  Australia
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Varies, kind of like a [added] sibilance that lots of folks like as it adds 'clarity'/'detail' and/or adds a layer of fine noise that lots of folks like for its 'richness' kind of like vinyl does [at least old vinyl, no experience with digital].

Experiment with some open cell foam wrapped around the mouth, extending a bit in front and wad up some cheap cotton towels to place around it to isolate it from the cab to get the worst of it.

Experiment with fish tank filters in the throat and adjust the HF if need be.

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Old 21st September 2019, 08:03 AM   #13
LeifB60 is offline LeifB60  Sweden
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Sorry !
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Old 21st September 2019, 05:33 PM   #14
GM is offline GM  United States
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Old 21st September 2019, 05:42 PM   #15
GM is offline GM  United States
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Experiment with some open cell foam wrapped around the mouth, extending a bit in front and wad up some cheap cotton towels to place around it to isolate it from the cab to get the worst of it.
Forgot to include..........or better yet, just wrap the entire horn/driver with a thick down bed comforter or with one or more layers of a blanket to mimic it with it extended a bit forward of the mouth to ensure no reflections other than those generated inside the horn.

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