Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 178 - diyAudio
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Old 20th November 2006, 02:20 PM   #1771
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Default Hemp 8

Hi
I will do it but as my ceiling height is way much more as usual
230 inches I do not know what the interaction will be with an exit so far from ceiling.
Upside down, where to position the speaker as only to flip the design the speaker will be too high for a comfortabel ear position.
I do know a lot of questions but here are two deja build upside down.
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Old 20th November 2006, 04:09 PM   #1772
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Default a little more in the bass region

http://www.lautsprechershop.de/hifi/...i/ripol_en.htm

or vented million times

http://linkwitzlab.com/woofer.htm

the first does need only modest power I do guess

as a TL would look rather strange aside a BIB...twin towers
I do not like
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Old 20th November 2006, 04:45 PM   #1773
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Default my amp

and that will be..... hopelly by december my amp
http://www.stoetkit.nl/stoetkit2.php

did found the Hemp 8.01 in Germany so no customs I'm happy ....
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Old 20th November 2006, 05:45 PM   #1774
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Why on Earth are you worrying about the bass? That's the last thing you need to be concerned about.

See those 1/2 space graphs on the Zilla site? 1/2 space means you will get the level of bass indicated on the graphs out of the speaker if it's standing in the middle of a field. The room will simply extend what is there (which is not exactly lacking), and help to kill the ripple in the response. If you've a rear wall or two, you'll be fine.
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Old 20th November 2006, 06:35 PM   #1775
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Default so what

First of all
I do not have a rear wall, they have to be 5 feet from the wall
it is a factory with rather big windows build middle of 17 century.

I do not have corners as in one is the entry and the other the stairs to the galery.

It is a Loft one huge big room, working, designing fashion, sewing maschine and books and about 1000 disks, a professional tape recorder and other bizzare things ..LOL, kitchen, living, with above half the room a gallery, bathroom master sleeping.

Where I do have to place them my ceiling is 24 feet heigh !!!!!!
or more than 7 meters,
the ground will be solid pine !!

My question allways the same SORRY for that...
As ceiling reflection is important and here in France ceilings are in the center of Bordeaux verrz often 15 to 18 feet
mine is not special at all

what upon downfiring and how to calculate ??

If downfiring Zdriver will be where ?
= Driver xx" down from sealed end

That is my question...
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Old 20th November 2006, 06:50 PM   #1776
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Downfiring makes no difference to the calculations, though you'd need to chop the terminus at an angle so it's actually venting into the room, not sealed to the floor. Zdriver doesn't change either. It's always taken as a particular distance from the sealed end. Inverting the cabinet makes no difference to it's place along the line.

I'm not convinced you're looking at the right sort of speaker for your room here though, now we've got more information on it. If I were you, I'd probably look toward either a mass-loaded type (Greg's ML pipe for the B200 instantly springs to mind), which don't need any boundaries at all, or a horn like the Fostex Factory design for the FE208ESigma which will do your room justice, and, though it looks complicated, is a very easy build as it's all right angles. I'd got for those over a BIB (yes, I did say that!) in your circumstances.
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Old 20th November 2006, 07:12 PM   #1777
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Default Merci

First of all
a very good reponse , a great forum, a great place

So where to go getting more information about it
>>a mass-loaded type (Greg's ML pipe for the B200 instantly springs to mind

Did found that with a Hemp
http://gallery.bcentral.com/GID49565...n-project.aspx


and a tweeter that could go with

http://www.alcone.de/index_en.htm the AC 15
at 94 db with a small horn as Edgar
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Old 20th November 2006, 08:55 PM   #1778
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Default I cut wood today

I am making a BIB mule as a sample.

Cut some wood already so there's no going back. :-)

I'm making this post to show that some actual work is
being done.

What I'll be doing with this one for the Fostex 127e is
have the right dims as given previously as 49.5 in.
and make a false bottom so that the driver center
down 19.5 in from the top is also 41 in standard ear height
from the floor. I'll maybe put some bricks or other
stuff I find in the cavity.

Other thing that always gives me fits is getting the
hole centered. I know how to work the diagonal
and work my way up from a caliper sized center to
a scratch awl, drill that through and then use the
hole saw. With all that I still see my centers slightly
off by the time I get up to the centering bit on the
hole saw.

What I thought of doing is have the hole saw centering
bit re-machined to a brad point bit. Is that possible
and how much to have such a job done at a small
machine or sharpening shop? I've wanted to do
that for some time but figured the cost would be
exorbitant (i.e. over $5.00). I don't know if the metal
can be remachine effectively.

Finally my question is on supra baffles. I have some
precut elliptical (oval) plaques. How do I find the
center of those things?

Haven't cut my driver hole yet. I'm waiting for the
right moment tomorrow.
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Old 20th November 2006, 09:02 PM   #1779
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Default not Bib but Vadim Horn

tried to make a new thread
as the search gave a lot but no result
upon Hemped horns not BIB ish
but told mz...saerch the forum

so a bit bizzare but

Hallo
as a BIB is not suited for my room,
to big, no corners to use....
ceiling 23 feet above, and living in a late 17th century factory flat, in the acient part of Bordeaux 12th century and 14th century buildings ar only two steps away.

Who has a glue about this
http://gallery.bcentral.com/GID49565...n-project.aspx

The Hamp looks very promising and is much more cheaper and less DIVA like as any Lowther or AER.

I do like horns as they do play music like no other speaker.

I love this amp
and not so $$$$ for the two
http://www.stoetkit.nl/stoetkit2.php

who knows about that horn with a somet freanch sounding name
google and copernic showed only e-spaeker

what else is out there if it does not need corners with a fullrage ..maybe Hemp as horn.

Or what else with a plan to build as horn with mids
for female voice, classic, hard rock, jazz,
eg normal music taste ..modern french rap
and a decend bass
maybe with a Fostex or Visaton compression driver as tweeter
but not more as 2 ways please

The Hemp WHy ?????
me not french at all an UK-German mix Heinz 56 Varieties
have done visinting http://www.boxen-baustelle.de/
they are the distributor for the Hemp
and have a somewhat TL spaeker in a hemped version on show.
Even in this cheap trick loudspeaker the sound was really fantastic and not L..ther esoteric, not purist Hifi, simply fantastic and deja bass was quite real for me. Anzway sexy beast II was not my cup of tea way from being perfect


a long one
me a petite blonde with brains LOL
not building amps or speakers first time, build my own guitar and even kitchen, rebuild my Garrad and piano

Glamour will never die
in arts, fashion and Muzik
enjoy
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Old 20th November 2006, 09:47 PM   #1780
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Default Re: I cut wood today

Lon, why not use a router with a Jasper jig (as talked about earlier in the thread)? You don't even have to buy the jig, just make one yourself - a piece of formica or thin kerf of something dimensionally stable that attaches to your router base and has holes for nails at measured distances out from the bit. drive the nail into the center of the circle through the right spot in the jig and simply route it out with a plunge router. No wobbles.


Quote:
Originally posted by loninappleton
I am making a BIB mule as a sample.

Cut some wood already so there's no going back. :-)

I'm making this post to show that some actual work is
being done.

What I'll be doing with this one for the Fostex 127e is
have the right dims as given previously as 49.5 in.
and make a false bottom so that the driver center
down 19.5 in from the top is also 41 in standard ear height
from the floor. I'll maybe put some bricks or other
stuff I find in the cavity.

Other thing that always gives me fits is getting the
hole centered. I know how to work the diagonal
and work my way up from a caliper sized center to
a scratch awl, drill that through and then use the
hole saw. With all that I still see my centers slightly
off by the time I get up to the centering bit on the
hole saw.

What I thought of doing is have the hole saw centering
bit re-machined to a brad point bit. Is that possible
and how much to have such a job done at a small
machine or sharpening shop? I've wanted to do
that for some time but figured the cost would be
exorbitant (i.e. over $5.00). I don't know if the metal
can be remachine effectively.

Finally my question is on supra baffles. I have some
precut elliptical (oval) plaques. How do I find the
center of those things?

Haven't cut my driver hole yet. I'm waiting for the
right moment tomorrow.
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