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Old 21st December 2007, 02:05 PM   #1
bigwill is offline bigwill  United Kingdom
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Question Vague horn questions

  • Is it possible to get a backloaded 18" driver from 40Hz to around 150Hz with 100dB or more efficiency? (In a bass "scoop")
  • Is the subjective bass quality tight and clean?

I have actually read around the internet quite a bit on this subject but I haven't been able to answer these questions.

Usually I'm all for OB bass but horns have grabbed my attention recently, namely due to their high efficiency.

I don't require deep bass but I love 'punchy' and 'tight' bass, which horns are said to be renowned for and I would love a system that was 100dB from 40hz-20,000hz
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Old 21st December 2007, 02:06 PM   #2
bigwill is offline bigwill  United Kingdom
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(Don't worry about putting huge effort into answers this is all mere speculation on my part at the moment)
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Old 21st December 2007, 02:56 PM   #3
GM is offline GM  United States
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Old 21st December 2007, 04:00 PM   #4
limono is offline limono  United States
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Hi
Check out Audiogon listing of Edgar Horn mid bass (sold) .There is a picture of dual 18" BLH built by JohnK (John Kalinowski) It will give you an idea of how big those bass towers are . John is very friendly and helpful ,I 'd shot him an email .My EV Patrician IV sporting 18" is twice the size of my bachelor fridge . (a little bigger than double door fridge) .
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Old 21st December 2007, 06:14 PM   #5
bigwill is offline bigwill  United Kingdom
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How well would scaling this up to fit a suitable 18" driver work:

http://www.dancetech.com/aa_dt_new/a...did=171&lang=0
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Old 21st December 2007, 06:34 PM   #6
GM is offline GM  United States
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Considering Hornresp, etc., why would you want to take such a hit-or-miss performance gamble?

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Old 21st December 2007, 06:40 PM   #7
bigwill is offline bigwill  United Kingdom
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I haven't figured out hornresp yet Maybe I should.........
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Old 21st December 2007, 07:02 PM   #8
AKN is offline AKN  Sweden
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Hi,

How about this Rog Mogale designed scoop (18" driver):
http://www.speakerplans.com/index.php?id=18superscooper

Rog has caveats for scoops muddying midbass just where the driver direct radiation starts to rise and mix with the horn output.

I have built 15" scoops in the past and was quite satisfied. It should be mentioned that I used my scoops below the supposed "trouble range" in the upper midbass.

Se this JBL document for typical scoop response curves:
http://www.jblpro.com/pub/obsolete/L...nclosures2.pdf
It can be seen that everything is fine under ~100Hz then comes the "trouble range" as mentioned above.
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