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In the Forum: Horn-Loaded Speakers
In the Thread: 60hz, GPA-515-8ghp horn...
Post Subject: Horn math...Posted by chaos on: 7/4/2008
it would be nice if somebody who knows a thing or two about mathlab and pspice would develop a accurate model. in pspice one could include the crossover in the simulations....
when i tried your recommendation with s2 and 3uF cap my "basshorn" refused to roll of;-)
btw, i have a clear plastic diaphragm, the daylight made it clear, sorry for the wrong information, was fooled by reflections at night!
liked the sound of the s2 but of course the folded basshorn sounded terrible at 900...
i dont really trust the simulations, but searched the web and found that the results of hornresponse at the low end are quite close to measured response.
i know you dont like hornresponse, but for me it´s a usefull tool, i need diagrams and pics to understand things. thinking like a child.
the horn i run now was just build after a plan, did not have to think about.
i´m slowly diving into this horn thing, the 1st thing that was disturbing for me was the way expohorns are calculated in the xls-sheets i found online.
i got the formula, draw a sketch( calculated the segments of a circle;-) and got not the result of the xls-sheets. flat wavefronts. was strange for me.
ok, i was told, the wavelenghts, it doesnt matter.
i dont know what matters. thats the reason i started to ask, normally, i read only...
(ah, your question about 515 midbass...strange that you got only 1 reply, but this horn is even shorter than mine, way shorter).
ordered the 515-8ghp yesterday, hope i can get it working.
you said, you heard 515´s in basshorns, nothing was working, what was the reason in your eyes(ears)?
dont want to repeat someone else mistakes...
you implanted the idea of a 300-1000 horn in my head(was not that difficult, want to get out the max within my options), so maybe you can answer some questions:
should it sit right over the midbass? midrange inside on earlevel? 2405?mr between midbass and lower mr?
s2..of course jezzie is right, but i simply cant affort to buy it at the prices they have now.was expensive for me 15years ago, but still a bargain.and new.
what driver would be ok for lower mr? any new production ones?
of course i would like to go all out, but its simpy not possible in this case;-((((
s2dia...does it make sense to look for the white ones? where?
thx, klaus
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