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In Reply to: RE: compromises - at what frequency is the first horn in the system most critical? posted by freddyi on October 16, 2015 at 01:14:27
Freddyi, horn loading is optimally applied over the entire bandwidth. I am not ready to trade in my 15 Hz. flare constant horn sub for anything else after all these years. Once accustomed, why would anyone accept higher harmonic content? Sure the thing is a beast, but then we need to maintain standards, right?
Today I was tuning a piano at a performing arts center, and they were evidently sweeping the subs in the hall next door through a heavy concrete wall for a Norteno concert this evening. The harmonic content was obvious, not good, and quite unwelcome. Yuck!
Follow Ups:
I know - but not everyone has space for a full horn system - as a compromise I might use two little Karlson augmented by tapped offset driver pipe sub - a better 10" or K-tube on top - maybe inside the front chamber
Karlson Evangelist
Edits: 10/16/15
I mean the tall one....is that your Karlflex you were posting about previously? is the photo with a 12" or 10".. how low and high does it go?
Very cool stuff!!!
FM
designed by Diyaudio's TB46 (Oliver) for a 50 buck Infinity 1260W
and expertly built by Triticum Audio (Jesse Brunner)
it has beautiful lock- miter joints at its corners.
The plan calls for a round aperture but I wanted the pseudo K
aperture for aesthetics. The aperture edges are radiused - it can chuff a bit
with sine but suffices for music
Response
Plan
the "Karlflex" is Diyaudio's Matthew Morgan J's baby
and in its beginning incarnation has such a small front chamber
that there's no conventional K-aperture - just the opening
shown as "E" in the image below. It features a 1/4 wave harmonic smoothing
stub which also functions as part of the front chamber's volume.
The idea for a smoothing stub as I first saw it was from Ken Lehman who had a very long Nautilus tapered stub. I assumed a simple rectangular chamber would work. I think bandpass sims might get one into the ballpark but Matthew wrote an intense Akabak script which also includes a third/optionlal parasitic chamber - something like a parallel 6th order bandpass box.
Karlson Evangelist
Edits: 10/17/15 10/17/15 10/17/15 10/17/15 10/17/15
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