Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 456 - diyAudio
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Old 2nd July 2009, 12:18 AM   #4551
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Some consider the Orions the best speakers ever. There is a lot of technology there, open baffle, h-frame woofers, very expensive drivers, modern crossover design, powered components, extensive engineering, etc... BIBs are much more simple - single driver, cabinet integration, corner load, hi eff, no crossover... totally different beast but a beast no less... maybe an 8" BIB would be a more fair comparison? Regardless, both are excellent designs. Enjoy them both!

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Old 2nd July 2009, 02:34 AM   #4552
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Thanks Jeff. Samuel, please excuse the tone of my last post I did not realized that it can be read differently. I meant no sarcasm. I'm just trying to explain the difference between the speakers being compared.

Jeff, I ordered the 8 inch versionof the EZ and one day I will find a way to build another BIB. My problem is that I have 6 different Fostex speakers and I'm running out of space to hide them when not in use. I intentionally relegate my F200A as home theatre speakers just to apeace my wife. Godspeed.

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Old 2nd July 2009, 07:58 AM   #4553
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No, I have not heard the Orions. So perhaps, I made an unqualified speculative comment.

Perhaps, not in a BIB. However, with the FE168EZ in an OB like the 'Dark Star' with an 'H' Baffle subwoofer assistance, the combination should sound fantastic.

Or in a Moose BVR, an EnABLd FE168EZ should give a performance in a different league altogether. I am just waiting for the day when Scott and Dave would release an official BVR design for the 168EZ. For the present, I have mine playing in a QWL and they sound fairly good; the bass could be better. I plan to use a Fountek ribbon as a super tweeter, which I also have unused till date.
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Old 3rd July 2009, 01:54 PM   #4554
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Hello everyone!

I wanted just to show (off with ) the BiBs me and my brother built a few months ago. The drivers are FE206E and the amp powering them is a F2 clone.

With good records the sound is very voluminous, or spacious, don't know how to say that .

As the drivers are breaking in, I feel that I need to play a little bit more with the equalization network... and maybe play with the stuffing, but no time at the moment.

Thank you for the nice project and helpful instructions .

Click the image to open in full size.
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Old 3rd July 2009, 05:15 PM   #4555
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Quote:
Originally posted by Samuel Jayaraj
I am just waiting for the day when Scott and Dave would release an official BVR design for the 168EZ.
You mean this one http://p10hifi.net/tlinespeakers/FH/...map-291208.pdf

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Old 6th July 2009, 03:26 AM   #4556
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Quote:
Originally posted by planet10


You mean this one http://homepage.mac.com/tlinespeaker...map-291208.pdf

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Dave, I had not seen the layout of the Ceinwyn-Chang earlier. Are these preliminary dimensions or has someone built, measured and listened to these?

Personally, I would have loved a curved profile of the horn mouth, just for aesthetic reasons, if not technical.

My guess is that these would have an in-room response of about 50Hz; or is my guess wrong? While I agree that the dynamic range of a horn is closer to emulating a live performance, how does one get a sub that goes pretty low to sound just as fast as an FR?

This is precisely the reason why I continue to use a quarter wave pipe; it helps me get response below the driver fs. Thanks.
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Old 6th July 2009, 04:06 PM   #4557
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Cool design for the Fostex 168ez... wonder if it would work well enough with the older style 168z i have lying around in boxes?

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Old 6th July 2009, 06:19 PM   #4558
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Quote:
Originally posted by Samuel Jayaraj
Are these preliminary dimensions or has someone built, measured and listened to these?
Those plans were pushed to the top so that Peter Reinders could build a set. There is a thread somewhere here where he talks about his results,

Quote:
My guess is that these would have an in-room response of about 50Hz; or is my guess wrong? While I agree that the dynamic range of a horn is closer to emulating a live performance, how does one get a sub that goes pretty low to sound just as fast as an FR?
Should be good to under 50 Hz. To get a sub to blend it has to have good HF response... a woofer as opposed to a dedicated subwoofer is usually indicated.

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Old 7th July 2009, 03:03 AM   #4559
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Thanks Dave. I've sought Peter's impressions, as of now, on that thread.

Is there a curved profile I can follow for the horn mouth which might look better and not compromise on sonics?

Thanks for the input on sub vs. woofer. I have a pair of LAB12 drivers and quite a few of the other Eminence drivers, including 3015LF, Beta12LTA, HL10A among others. However, I reckon that I might have to look for a pair of woofers with enough Xmax and power handling and use them below resonance in push-push or pull-push configuration with electronic compensation. I am just a bit worried about colouring the sound with all of that electronic correction. Graham Maynard published a discreet circuit in EW which might be better than any op-amp based circuit such as Rod Elliot's.

It is due to this apprehension, I have been looking for a 'one box solution' with only a super tweeter to boot.

I am looking forward to Peter's comments and from others who might have built the Ceinwyn Chang and soon might be able to build a pair.
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Old 9th July 2009, 07:18 PM   #4560
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bump!
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