RDH20 frame double horn for two 8"FR - diyAudio
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Old 26th June 2009, 08:22 PM   #1
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Default RDH20 frame double horn for two 8"FR

Hello,
ich made a new construction,

three new constuction features
bass horn mouth distance
membran movement cross setting
frame horn mouth

Frame double horn for 8" fullrange driver,
back driver again the BG20 von Visaton,
also invers montage with +- change possible.
Near the Saxophon but it might be, with
better soundstage and more direct bass.
A lot of softfibre reduce enclosure sound
and makes it cheap and easy. The horn swims
on softfibre in the horn mouth.

Also available the AN 8" with the pioneer 8" FR,

opinions?
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Old 26th June 2009, 08:24 PM   #2
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Default RDH20

inside

Click the image to open in full size.
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Old 26th June 2009, 09:06 PM   #3
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have read you great site a lot of times but dont understand one thing, why do you name horns th ethings that are TLs?

To be a horn with tuning for such low frequancy it should have mouth times bigger.
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Old 26th June 2009, 09:23 PM   #4
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Hello,

please read in the middle:
http://www.hm-moreart.de/11.htm

in living rooms the flare rate and the length
are more important than horn mouth size.
look measurements of the SAXOPHON:

http://www.hm-moreart.de/86.htm
goo.. Translate helps, but the graphs show enough
96 dB 1 W 1 m ~37 Hz.
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Old 27th June 2009, 05:59 AM   #5
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Hi, I will read it thank you. For this moment as I know - the more we reduce mouth size, the more peaks and dips we get in response.....
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Old 27th June 2009, 07:01 AM   #6
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Hello,

your are right:
"the more we reduce mouth size, the more peaks and dips we get in response....."

but look for example
the KORNETT
and Subfanfare measurements
what happens to the Imp mountains
of the single simulations
after connecting parallel.
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Old 2nd July 2009, 01:53 PM   #7
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Default measurements

Sica +B200 with BG20 rear,
Listening place
http://www.hm-moreart.de/119.htm
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Old 2nd July 2009, 05:55 PM   #8
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Wunderbar!
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Old 3rd July 2009, 04:04 PM   #9
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Default very nice

Very nice design.

I always like the designs using two fullranges drivers (like the lowther academy) for their big soundstage and that u can move while listening to music and not obliged to stay on the sweet spot !


do u think it could be used with a lowther as a front driver (I own a pair of pm2a that I ll maybe ask to be reckoned by M. STAMM) ?

regards
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Old 3rd July 2009, 04:32 PM   #10
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Thanks,

PM2A may be with extra baffle,
the driver is deep.
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