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Old 17th October 2005, 07:03 PM   #131
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Default Re: TL design discussion

Quote:
Originally posted by Byrd
What makes a Mac isn't going to be what makes a Mac soon.

"We all run x86 down here"
What makes a Mac is the OS. Apple has already been thru 1 processor change which happened pretty seemlessly (the change from the classic OS to unix was a much bigger challenge), i expect the switch to Intel will be even smoother, and without looking at the box or the "About this macintosh" info a user will be unlikely to tell the difference between a PPC or an Intel chip.

I have nothing against x86, it is Windows that sucks... its on par with the majority deciding B^&* makes the best hifi

dave
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Old 17th October 2005, 07:05 PM   #132
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Default Re: TL design discussion

Quote:
Originally posted by SCD
be laid back in a paralelagram
After seeing the WR125/ApexJr bipoles you did like this, i'm totally sold on this approach. They were much nicer aestheically than the stand-up bipoles (and once we got the cap size sorted, showed just how good that combo is)

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Old 17th October 2005, 10:26 PM   #133
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Quote:
Originally posted by MJK
Scott,

I agree with SCD, good summary.
But I will add two minor corrections.

This is only true for straight TL's. If the TL is tapered or expanding then the frequencies of the harmonics will not be nice even multiples of the fundamental. The equation f = n x c / (4 x L), where n = 1, 3, 5, 7,... , only works for straight TL's.
Thanks guys

Sorry Martin, good point[s] & thanks for putting me straight on that one.

Cheers for now
Scott
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Old 22nd October 2005, 02:21 PM   #134
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well, I bit the bullet -- MDF is cheap -- will make a proto-type of the slanted fat Thor. gotta keep busy this winter anyway.
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Old 22nd October 2005, 05:19 PM   #135
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Quote:
Originally posted by jackinnj
I bit the bullet


Jack,

Do you have measuring capability?

I've been thinking about turning this thread into an article, and just sucked all the text down to edit into something coherent (except for the detail i could probably write the article out of my head -- this has been gestating for longer than the thread.

You building one -- and then getting measured results, and listening impressions are the last required indredients.

Title? "Greening the Thor" or "Revisting the Thor" subtitle "Here comes Fat Thor" or "The Story of Fat Thor"

dave

PS: if this actually comes together, and Ed writes a cheque, i propose that the stipend get donated to diyAudio (less possible expenses such as, of necessary, gas to get Fat Thor to someone with measuring kit or vica-versa)
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Old 22nd October 2005, 06:18 PM   #136
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Quote:
Originally posted by planet10

Jack, Do you have measuring capability?
Do I have what?

Click the image to open in full size.

I've been using the same KEF B139 based reflex spkrs for about 14 years, so will have to find my calibrated microphone.
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Old 22nd October 2005, 06:26 PM   #137
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Hey I started this this thread - I want a finders fee

Lol @ the measurement e-quip-ment.

Dave - think that the article would be excellent. and no doubt bow to the slight advantage jackanini may have in terms of capacity to measure . Prehaps SEAS might be interested in making a small donation to Diyaudio aswell?
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Old 22nd October 2005, 09:11 PM   #138
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Quote:
Originally posted by jackinnj
Do I have what?


duh....

actually i think i've probably seen that pic before.... i sorta knew, but just to make sure i had to ask.

dave
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Old 22nd October 2005, 09:13 PM   #139
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Quote:
Originally posted by Byrd
Perhaps SEAS might be interested in making a small donation to Diyaudio aswell?
Worth asking for sure.

I was also thinking they might want to independently verify our results? Then we would have data on both under exactly the same conditions. Who knows... maybe even the same drivers & XO?

We even have an insider posting in this thread....

Bjorn??

dave
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Old 27th October 2005, 07:22 PM   #140
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Dave --

the SEAS parts arrived today -- I am going to make one cabinet per the AX/Seas instructions -- the second -- "Fat Thor" or "Short Thor" -- what do you think?

the board isn't expensive, I won't do any veneering -- check out the performance and then go with the full-blown versions.
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