Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 125 - diyAudio
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Old 30th August 2006, 09:40 PM   #1241
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Quote:
Originally posted by GM


... of course the XOs will be off unless you replicate the Ariel's baffle width/shape and place the BIBs well away from any walls/corners, negating some of its benefits unless floor loaded.

GM

Thanks for replies on Ariel BIB.

Yes, I had forgotten the xo is tuned to cab dimensions (width) and speaker placement. The BIB dims end up 1" less on width but I could account for this with a "false baffle" setup. Then there is the placement so maybe floor loaded is the answer.

I got the drivers and xo components around 8 years ago then ended up with my RD75 ribbons so never built the Ariels. Also the Ariel cabs are far too complicated for me so thinking of a simple way to use them!

Ah - the benefits of a full range driver!

Cheers,
C
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Old 30th August 2006, 09:51 PM   #1242
McFaBs is offline McFaBs  Italy
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Hi GM, hi Scott

Good informative talk as usual! I'd never considered floating floor problem before, here in Italy it's usual practice to build rigid floor...

As I mentioned before I had bad experiences with granite, marble and other stones and also with MDF.

So I used plywood with spikes or dumping feet (Scott - nice idea cork feet!) and after, I built a modified platform " la" Bright Star : plywood box (instead of MDF) not filled with sand but with the same red thin powder used in tennis court (if it's not Rolland Garros one works as well).
I sealed the top boundary slit with black sealant silicon and brass spikes screwed direct in the wood base, part of the hole depth filled with silicon to create a small compression by levelling and screwing the spikes.

They worked pretty well until I got table, platforms and stands made by a friend of mine who worked on "tuning" those accessories considering (he told me) the natural-fundamental harmonics....I don't know, but these are great objects. Now it becomes a commercial affair and unfortunately prices rised to the moon! Just for the sake of it (I don't want to do any advertising) this is what I'm using http://www.dmlaudio.it/index.htm
see Baset-Toni Model4, Saratoga, IceTowers.

Talking with VIVA amplifier producer he suggested to use for his own tables and platforms "tone-wood spruce and maple" same used for strings and pianos, but not cheap at all....

Ciao.Fab.
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Old 30th August 2006, 11:55 PM   #1243
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Sorry Scott, I didn't mean to imply you had recommended marble or granite as the base.

I was simply going to stand the cab on a plinth with blutac or something similar.

GM, thankyou for clearing up some of my confusion. I'm using inner tubes under both my

amp and source, never thought of incorporating into the speaker bases.

You said "the bottom and two corner sides should be lossy, to damp down unwanted harmonic

energy", do you mean use another [more lossy] material for those cab walls, or use felt or

something on them? What is an example of a lossy construction material?

So the top of the cab will probably be to close to the ceiling. Before I saw up my timber, your

pretty sure that scalloping out the mouth will stop any booming?

Thanks everyone, John.
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Old 31st August 2006, 09:14 AM   #1244
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Talking Just built a pair and WOOF!!

I just built a pair with the Tang Band 1052's (for a friend but my girlfriend may have difficulty parting with them :-) ). I just wanted to say a big THANKS to everyone who did work on this design or making it easy to figure out and build. And for anyone still debating this DO IT. You won't be disappointed with the sound.
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Old 31st August 2006, 09:34 AM   #1245
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John
Back-cutting the mouth will probably help, though as for boom, I don't think anyone could say until you try it! Increasing the stuffing will also help a bit there if it's a problem.

Chris
I did an MLTL for the Ariel's a while back which might also suit. I was a little harsh on the existing Ariel cabinet on this thread -a view I've since modified somewhat. However, it's still a right old pain to build, being as complicated as a complicated thing that enjoys quadratic equations in it's leisure time. The MLTL is a heck of a lot easier if you wanted a simple build. http://www.diyaudio.com/forums/showt...706#post817706

It's a max-flat cab, as I figured these drivers need all the help they can get in the LF. I paralled the drivers for the sake of the impedence in the model, though the XO will doubtless change it somewhat. Should still work pretty well though.

Best
Scott
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Old 31st August 2006, 10:50 AM   #1246
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Hey, thanks for the MLTL Ariel design Scott - that works better than a BIB in terms of fitting into the original design/xover. And MLTLs are just as easy to build as a BIB.

I shall build them. Daft thing is I will prolly end up selling them fairly soon but thats better than having the drivers sitting there another 8 years!

Cheers,
Chris
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Old 31st August 2006, 05:36 PM   #1247
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You're welcome. Do let me know how they sound when they're finished. Zix has a pair under construction at the moment, but work has been very slow and they're not yet complete. So these could well be the first pair complete.

Scott
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Old 31st August 2006, 07:49 PM   #1248
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For these TB 1052's I'll compare them to my Vifa/Dayton "All Aluminium" main speakers. The TB's sound warmer but they're lacking on the very top end. Although I can't get the volume of the aluminiums, at the same levels I really like the sound of the TB's. They've completely impressed everyone with how big they sound. My brother even checked to make sure the sub wasn't on! I've moved them into the bedroom 8'x14', 7' ceiling, and even hooked up to a "boom box" they sound even larger. All in all an outstanding auditory experience. As I'll be giving these as a gift in November, any ideas for my NEXT driver in this outstanding cabinet?? Maybe, something with a little bit better HF extension?

Thanks,
Bruce
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Old 31st August 2006, 09:30 PM   #1249
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Chris
I intend to tinker with my 168 BIB's this weekend and add ring baffles to them. What are the dimensions that you used?
Also...have you tried the cork treatment mentioned a few pages back?

Ray
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Old 31st August 2006, 09:39 PM   #1250
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Hi Ray,

Ring baffles are 300mm dia. 18mm MDF. Chose the diameter more on asthetics.

No haven't played with stuffing or cork lining at this point. Waiting for the drivers to be more fully run in before I play - only 100hours approx at the moment. Mind you they are sounding awesome so am happy to leave as is for now.

Cheers,
C
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