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Old 19th July 2013, 03:42 AM   #51
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From what I remember modeling this type of enclosure once you raise the range you'll see another peak up high.
Simmed with TL software sometime back showed that it was best used with a high Qts, limited excursion type driver that yielded a hump in the midbass caused by the upper enclosure and then extending down through the low Q tuned resistive port into the lower enclosure where the whole is tuned deep.

The driver I used was a peerless 6.5" with a healthy Xmax and a QTS of around 0.5. It was handy because optimum acoustic suspension was ~0.5' and optimum BR was ~1.5'

There was one ratio divided enclosure that must have been a fluke because there was a massive resonance around 300Hz that yielded a broad peak of at least 10dB more than what the driver is capable of, ending with a reduced/shelved low end response. Thought of Danley at that moment, standing there laughing, shaking his finger at me saying that's not it!
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Old 14th August 2013, 09:14 PM   #52
4Torr is offline 4Torr  United States
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Default Found it - The Dynaudio Sirius Enclosure

Double chamber aperiodic enclosure.


http://www.gattiweb.com/images/dynaudio/sirius2.pdf

http://www.gattiweb.com/dynaudio.html

Last edited by 4Torr; 14th August 2013 at 09:21 PM.
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Old 14th August 2013, 10:03 PM   #53
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two variovents
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Old 15th August 2013, 12:05 AM   #54
4Torr is offline 4Torr  United States
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Quote:
Originally Posted by Greebster View Post
two variovents
Sirius-ly damped !
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