Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 64 - diyAudio
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Old 11th May 2006, 05:10 PM   #631
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Hi Godzilla

nop not the last, but the only difference is, that the last one said

"Z Driver = Distance of driver center to sealed end (So)"

... but yeah, let's wait until all is clear, I can change whatever needs to be, just shout.

best,
martin
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Old 11th May 2006, 06:00 PM   #632
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Hi Martin

Hell's teeth, that's getting on for Lowther levels of difference between T/S parameters. That said, I'd still leave it as is, or use the same line length and driver position, with the terminus area from the Super. The extra length won't be a problem, and the extra volume won't hurt. Personally I'd still buy a Fostex unit, but that's just me. I know them and trust them. Insofar as you can trust any big company. Or little one, come to think of it.
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Old 11th May 2006, 07:11 PM   #633
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Quote:
Originally posted by Scottmoose
Hi Martin

Hell's teeth, that's getting on for Lowther levels of difference between T/S parameters. That said, I'd still leave it as is, or use the same line length and driver position, with the terminus area from the Super. The extra length won't be a problem, and the extra volume won't hurt. Personally I'd still buy a Fostex unit, but that's just me. I know them and trust them. Insofar as you can trust any big company. Or little one, come to think of it.
Thanks Scott!

I see what you mean regarding 'Majors', 's why I rather keep my old Mercedes than get some 'el cheapo' newone...

But for the AN 6.5, I have a personal recommendation from someone I trust alot when it comes to FR drivers, he owns several Fostex and about each and every Modell of the good old Corals. He was actually pretty enthusiastic about the AN 6.5 in Horns, might be his personal taste... as always, there's only one way to find out!

best, martin
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Old 11th May 2006, 07:51 PM   #634
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You're welcome!

Sounds like a plan to me. One day no doubt I'll try the AN units.
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Old 11th May 2006, 08:04 PM   #635
Tweeker is offline Tweeker  United States
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Quote:
I love the look of Pine, but until it's been weathered for several decades is it ideally suited for speaker cabs unless well damped like Bob Brines does his MDF cabs and any knots epoxied to ensure they can't rattle/squeak/leak.


Im confused by this statements language. Could you please clear up what was meant. Pine is good until it gets weathered, or that weathered pine is good, or that unweathered Pine is fine, so long as extensive measures are taken? Thank you.
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Old 11th May 2006, 08:18 PM   #636
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Last weekend me and my boys were pushing knots out of the pine at Home Depot. We were lucky to find a few good straight pieces. In the end it will all work out fine... as long as nothing cracks!
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Old 11th May 2006, 08:29 PM   #637
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There's some pine boards sold which work quite well -a lot of the moisture has been baked out of them. Not as good as the natural way, but better than normal too. Rule of thumb with pine: if it's got resin oozing out of the knots, buy something else!
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Old 11th May 2006, 09:16 PM   #638
fred76 is offline fred76  Philippines
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Hi

On the topic of enclosure materials, has anyone here tried HDF (medite)? We have pinus radiata marine plywood here, eg no voids 7pcs. compressed for 18mm. It just sucks that it can only be bought by bulk.


Scott and GM,

BTW, I have these old Coral drivers on OB right now, but I'd like to try em on BiB's too. They are 8" coax types - very deep curvilinear cone with annular rings and diffraction horn bullet tweeter rigidly placed in front. Tweeter's magnet very near cone's felt dustcap. Frequency response was 'published' as 30-25kHz. The Fs is quite high though. I only have some of the T/S parameters.

Re: 7.8 Ohms
Fo: 30-45Hz
Fs: 100Hz
Qms: 4.33
Qes: 1.15
Qts: 0.91
Qo: 0.45 (40Hz)

Sensitivity is ~94dB. 15W.

I don't have the Vas. But maybe based on the recommended BR Enclosure Vb from the old catalog, a guesstimate could be arrived at?

BR Plan: http://pic4.picturetrail.com/VOL706/...9/93893985.jpg

It has a cloth type reverse roll edge surround much like the Beta series. Sorry, no idea on Xmax too etc. It has pretty stiff surround material almost like thin leather, but it sounds great on OB (needs sub set ~50Hz though for 'heavier' material). Magnet is pretty large, ~4.5" starting from basket legs.

I know it lacks data, hopefully though I can get a ballpark idea on the dims. Thanks! You guys rock *we salute you*.
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Old 11th May 2006, 10:13 PM   #639
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Quote:
Originally posted by Godzilla
Last weekend me and my boys were pushing knots out of the pine at Home Depot. We were lucky to find a few good straight pieces. In the end it will all work out fine... as long as nothing cracks!
The edge glued panels they have in lengths
out to 6 ft look nice and can be found with few
if any knots.


I'm playing with these for a bib build.


I've not seen any panel sizes 6 ' x 16" though
width seems to be limited to 12" shelf depth.
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Old 11th May 2006, 10:29 PM   #640
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I had a 4x8 piece of sand ply ripped 4x at 11.25" to keep costs down. Those pieces were brought to another saw to be cut again to the proper height. A 4x8 sheet of particle board was ripped at 7.75" to form the front/back/bottom and inner baffle. I plan to double up the front and back with nice pine once i get the stuffing right.

Peace,
Godzilla
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