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Old 16th July 2013, 04:52 PM   #11
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Inductor's Avatar
Join Date: Feb 2006
Location: Cascais
(I'm not really interested in the OB territory, for now!)
Here are some links.
Fast, fun, Inexpensive OB project
What are the best OB dipole DIY desgins for < $1K
AE Speakers Dipole 15 or LO15 ? Need advice
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Old 16th July 2013, 05:21 PM   #12
OscarS is offline OscarS  United States
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Originally Posted by Inductor View Post
Hi bjorno,
(As always I will be reading your link graphs for days) Can you be kind enough to explain in plain text...

So now we have 3 drivers.
1. Peerless 830987 3"
2. Fane Sovereign 12-500LF 12"
3. Alpine SWS 1023D

What's the relation of the last 2 drivers. I understand the Alpine is a sub, and the FANE goes on the T-TQWT. If I'm correct, you mean that the sub can be used /or not to the customer desire. The T-TQWT shows F3~30Hz for the FANE, correct? How does the FANE - what system, enclosure or OB it's working with it - in the last green graph you presented (F3~60Hz)? I assume it's OB from it's F3? Regards.
It is indeed the Fane in the T-TQWT. It is the one working the "subwoofer" duty, while the smaller Alpine takes care of higher bass frequencies, and the full range does the rest.
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Old 17th July 2013, 04:09 AM   #13
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Very well. Regards.
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Old 17th July 2013, 05:15 AM   #14
GM is offline GM  United States
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Join Date: Jun 2003
Location: Chamblee, Ga.
Originally Posted by ad70 View Post
For this type of project or for getting low bass in an open baffle design, is that something I need to be concerned about?

What would be the effects of a low Q low FS sub in an open baffle?
You want Fs to be as low as you want to go.

No bass without mass quantities of EQ, which means the driver must be able to handle it [high Xmax, RMS watts].

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
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