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  1. What is your point? Actually don't bother, you have been off subject from the beginning. You should take your type of debate to Audiogon or DIY Audio. There are many more there equally willing to profess the useless. Please stop hijacking this thread. This project (the one that was offered and that I also printed) is good, sounds good and is free from any nasty artifacts as long as you play by the rules. Honk is caused by not playing by the rules - mostly pushing the horn too low. This project works fine starting at about 1500 Hz. I can recommend it to any wanting to experiment wit
  2. You obviously have no experience with horns, so we will just leave your "honk" claim where it lays. As far as ringing metal horns goes, it depends if there is something with enough "power" to excite the resonance, the frequency of the resonance, as well as if there is adequate damping or not. What you claim are the typical "horn" criticisms from those without experience. Sadly, there is a lot to be learned that gets blocked with these "attitudes". I have tried this horn (modified it for a 1.4" compression driver), as predicted, it sounds just fine above 1K, low order crossover poss
  3. Generally a horn high frequency element is acoustically inert regardless if it is metal, wood, MDF or plastic. Material resonances are not significant if properly designed. Musical instruments are built to resonate. Resonant cavities and thin, lightweight construction make this possible, The only danger for a horn is reproducing frequencies too low for the flare rate. Then they honk. This project is very cleverly designed. I would guess it is good for frequencies>1000Hz. Audiophools attach myths to just about everything.
  4. The textured surface will not be any problem. Sound does not move like water from a garden hose. The air particles bump into adjacent ones to transmit sound. Other than that, they are pretty much stationary. Important is a rounded edge at the mouth and a perfect fitting throat to the driver to prevent diffraction.
  5. Beautiful job. I am looking to print a tweeter (5khz) and midrange (300Hz) horn too. I just need some more experience working with plastics. My day job is teaching people how to use CADCAM software for thermal cutting machines. Are you willing to share the STL file?
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