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Old 21st June 2004, 02:00 AM   #31
MJK is offline MJK  United States
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Quote:
MathCad does not impress me.
Ahhhhhhhhhh!!!!!!!! Blaspheme! MathCad is a big part of my pathetic life!

I have never had the problem you describe. Sometimes if the screen gets confused, try hitting "control-R" to refresh.
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Old 21st June 2004, 04:11 AM   #32
GM is offline GM  United States
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Neither clicking on the view/refresh tab nor ctl-r does anything.

GM
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Old 21st June 2004, 06:41 PM   #33
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Rather than doing a stretch Locust 34 inches tall, it would make more sense to do an even taller floor-standing speaker using the fe127e. That one has a lower Fs, higher Qts, and bigger xmax.

GM, would you care to try your magic on that one?

I'll give you something to shoot at:
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Old 21st June 2004, 07:01 PM   #34
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Anyone else notice that when you edit a posting and tell it to add an attachment, it tells you okey dokey, but it does not actually attach the file?

Here it is:
Attached Images
File Type: png fe127e floorstander.png (4.0 KB, 506 views)
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Old 21st June 2004, 08:42 PM   #35
GM is offline GM  United States
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At a glance, I doubt I can improve on it without going large flared. I did an extended max flat alignment awhile back for someone that a false bottom filled with kitty litter/whatever can be added to get the driver up high enough, but AFAIK it wasn't built:

L = 39.46"
SO/SL = 43.785in^2
driver down 14"
1.875" dia x 0.5" long vent near/at the bottom

BTW, does the view/refresh or ctl-r work for you?

GM
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Old 21st June 2004, 09:23 PM   #36
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Quote:
Originally posted by GM

BTW, does the view/refresh or ctl-r work for you?

GM
Not when it's being cranky.
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Old 23rd June 2004, 08:43 PM   #37
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The phase plugs arrived and I installed them. I did one side first and listened A/B. The plugs made a very distinct improvement. Not only was the treble distortion almost completely gone, but even the bass seemed to be better defined. I did the other side, then listened to them a long time last night. I think these little things may be sounding about as good as the Ariels now.
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Old 23rd June 2004, 08:49 PM   #38
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plugs
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File Type: jpg plugs.jpg (68.1 KB, 622 views)
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Old 23rd June 2004, 09:40 PM   #39
joensd is offline joensd  Germany
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Sorry for that OT-question that just comes to my mind.
GM, I "re-simulated" a lot of designs youīve given (thanks a heap)
to hopefully learn something from them.
Itīs going well so far but what still puzzles me is the driver position.
You always seem to have the ratio around 0.35xx.
I know (at least I think I know) that one should damp out resonances like the 3rd harmonic.
But especially there where you seem to set the driver the overall resonances seem higher to me.
I always get good results at around 0.45 +-0.02.
In the recent FE-127E design for example at 0.45.
Isnīt it advantageous to get a TL with overall minimized resonances
or am I completely on the wrong path?

Best regards
Jens

BTW: THIS one is on the way (the 42"). If itīs not gonna work out Iīll come over.
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Old 24th June 2004, 11:22 PM   #40
joensd is offline joensd  Germany
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Stupid me,
was obviously looking at the wrong graphs (overall fr) thinking why why why...

Jens - sometimes has an urgent demand for an answer circling his brain when he should just have another tea;-)
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