Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 74 - diyAudio
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Old 23rd May 2006, 04:51 PM   #731
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Default it depends...

I just use a single twisted pair of the stuff. one wire to positive (usually color) and one wire to negative.

try to keep the length short and it sounds good. actually it sounds great. that is, at below 15 watts...

thicker gague magnet wire is a little better though..

Clark
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Old 23rd May 2006, 04:55 PM   #732
el`Ol is offline el`Ol  Germany
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Hello GM!

Thanks for the tip with the series notch filter.

Hello everybody!

I guess it will be an easy task for MJK to modyfy his BLH model so that a TQWT-style closed end instead of a compression chamber can be modelled. Maybe for the lower Fs drivers this is the way to go to avoid silly sizes.

Greets, Oliver
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Old 23rd May 2006, 04:59 PM   #733
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Well I used two twisted wires per driver terminal, i.e., four wires per driver...should be twice as good?!
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Old 23rd May 2006, 05:11 PM   #734
GM is offline GM  United States
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Quote:
Originally posted by Godzilla
I hope this cat 5 thing works... i wired my BIB with it because i didnt have regular speaker wire..... 8 strands.... 4 to positive.... 4 negative... 24 guage each little strand.

Greets!

This equates to a little smaller than 18 Ga, so depending on how long the runs are and the amount of current they will need to pass, they will either be fine or act as a series resistor of 'x' value.

GM
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Old 23rd May 2006, 05:28 PM   #735
GM is offline GM  United States
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Quote:
Originally posted by Ray Collins
My apologies.....the picture file size is too large and will not transmitt. If anyone has a suggestion please provide it.
Greets!

Davey Jones? turned me on to 'SnagIt' awhile back or you can use the re-sizing feature and link it from an image hosting site such as ImageVenue.

GM
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Old 23rd May 2006, 05:54 PM   #736
GM is offline GM  United States
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Quote:
Originally posted by el`Ol
Hello GM!

Thanks for the tip with the series notch filter.

Hello everybody!

I guess it will be an easy task for MJK to modyfy his BLH model so that a TQWT-style closed end instead of a compression chamber can be modelled. Maybe for the lower Fs drivers this is the way to go to avoid silly sizes.

Greets, Oliver
Greets!

You're welcome!

You can do it the way it is now, but why bother since the ML-TQWT WS works fine?

Oops! I just 'outed' myself! I've been getting Scott to do the sims since I don't have the latest WSs that have the higher SPL plot field. I forgot about being able to do them in the BLH WS. Still, for consistancy's sake, IMO they should all be done with the same WS.

Once the different SPL scaling is accounted for, T.C.'s RS 40-1354 'BLH' sim looks 'close enough' for me:

GM
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File Type: jpg 40-1354 t.c. bib done in blh ws.jpg (24.7 KB, 696 views)
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Old 23rd May 2006, 06:37 PM   #737
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... the picture file size is too large and will not transmitt. If anyone has a suggestion please provide it.

Hi Ray... if you double click the icon of your image and it opens in a program called 'Microsoft Office Picture Manager' i can tell you how to modify it so you can upload it to the forum.

Godzilla

PS Thanks GM on the 18 Ga estimate. Usually 16 Ga RS is what i have lying around. Peace.
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Old 23rd May 2006, 07:20 PM   #738
el`Ol is offline el`Ol  Germany
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Quote:
Originally posted by GM



You can do it the way it is now, but why bother since the ML-TQWT WS works fine?


GM
Hello GM!

I have come to this thread quite late and I have to admit I have not gone to all this awful lot of pages. According to what I have read at the beginning, wasn`t there the problem that sims did`t work properly?

regards, Oliver
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Old 23rd May 2006, 07:57 PM   #739
GM is offline GM  United States
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Greets!

I haven't read all of the thread either, but I assume you're referring to the fact that none of MJK's freeware WSs will show the effects of the room beyond an infinite half space loading, which is all Scott has been publishing even though he has the licensed WS that allows a certain amount of room loading and floor bounce modeling.

Anyway, as you can see, the freeware BLH WS sims more than 'close enough' to his latest shareware ML-TQWT WS by inputting the BIB's design into the BLH coupling chamber fields and listing the horn length as 0.001, with St, Sm = SL, and linear flare rate.

GM
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Old 23rd May 2006, 09:57 PM   #740
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As per Ray Collins... here's your pic.

Nice job! I butt joined everyting... would have liked to mitre like you but dont have the tools.

Godzilla
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