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Old 30th September 2005, 06:54 PM   #91
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Default Re: A question to TL guys

Quote:
Originally posted by Feyz
each woofer is measured separately with the other woofer
It does look like this is the cause of the discrepency in measurements... putting too much driver in too small a TL decreases the bass.

Now someone needs to build a FatThor.

dave
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Old 30th September 2005, 08:47 PM   #92
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Bjorn, thanks for stepping in.

Feyz, good catch on how Joe D. measured.
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Old 30th September 2005, 08:52 PM   #93
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Maybe D'Appolito's listening room is a concrete bunker. With room gain the Thor would be flat down to 10Hz.
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Old 30th September 2005, 09:03 PM   #94
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Quote:
Originally posted by catapult
Bjorn, thanks for stepping in.

Feyz, good catch on how Joe D. measured.
From the text in that AudioXpress article, it is not 100% clear to me how actually he did the measurements. But I think he was at least recommending to do such measurements that way.
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Old 1st October 2005, 10:15 AM   #95
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An odd error considering. But then again, giving him the benefit of the doubt, he didn't / doesn't appear to have a huge amount of experience with TL behaviour, which is rather different to most other speakers.

A FatThor? Ouch. Ever get the feeling that would be one BIG cabinet?
Here's a thought: I roughly re-calculated the Ariel MK4 cabinet for the Seas drivers Thor uses. Same line-length and folding geometry as Ariel, cross-section scaled up for the larger drivers, 1.5"x2" (WxD) port at the base for each line. Not the best TL response available. But, if you want to D'Appolito these drivers, this is probably one of the better ways to do it without getting a cabinet of epic proportions and a swift divorce. Add 6db to overall response for the paralleled drivers, as usual, and remember to factor baffle-step loss into things as well.
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Old 1st October 2005, 02:47 PM   #96
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I am sure that one of you enterprising gentlemen (or perhaps 2 or more in collaboration) could write an article for AX or Elektor with an improved design -- I am plowing through Mr. King's mathematics this morning. Here's the link if not elsewhere provided: http://www.quarter-wave.com/
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Old 1st October 2005, 04:15 PM   #97
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Quote:
I am plowing through Mr. King's mathematics this morning.
Great way to spend a Saturday morning! Oh Jeez, look what I am doing, surfing the Internet. Gotta get outside .....
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Old 1st October 2005, 04:41 PM   #98
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Quote:
Originally posted by MJK


Great way to spend a Saturday morning! Oh Jeez, look what I am doing, surfing the Internet. Gotta get outside .....
Well, I already went to the dump, got the Volvo washed and filled, went to Shop-Rite, picked up Barrons and the Weekend FT, harvested the green tomato crop and am working on getting the basil and sage in before the first frost -- it helps when the little lady get's you out of bed at 6:30 a.m. on Saturday.
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Old 1st October 2005, 05:30 PM   #99
MJK is offline MJK  United States
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Wow! Your a better man then I am, makes me tired just thinking about all those chores.
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Old 1st October 2005, 05:49 PM   #100
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Quote:
Originally posted by jackinnj
I am sure that one of you enterprising gentlemen (or perhaps 2 or more in collaboration) could write an article for AX or Elektor with an improved design
I was thinking much the same... just rewriting parts of this thread would be a good article. "Revisiting the Thor"....

To get it published someone would need to probablt build one.... BrianGT has a pair...

dave
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