Terry Cain's BIB -why does it work and does anyone have those Fostex Craft Handbooks? - Page 180 - diyAudio
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Old 21st November 2006, 06:56 AM   #1791
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My question still remains; what is Sm for the new proposal of Line Length of 140 inches and Zdriver of 30.25 inches? This is Scott's revised BIB for the Fostex 168E Sigma.
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Old 21st November 2006, 08:44 AM   #1792
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My apologies -that one slipped through the net with all the activity going on in the thread. It remains the same as the shorter original at 74.25in^2. Zdriver tweak BTW -shift it to 29.25in.

Scott
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Old 21st November 2006, 08:49 AM   #1793
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Quote:
Originally posted by GM


Greets!
Original with notes in #240: http://www.diyaudio.com/forums/showt...709#post878709
BIB folding in #907: http://www.diyaudio.com/forums/showt...770#post945770
GM
Thanks Greg. The downside to a giant thread -things get hidden in the mix. I'd love to hear this pipe.
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Old 21st November 2006, 11:01 AM   #1794
stroop is offline stroop  Germany
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Hi folks,

Just wondering out aloud here. How would a modern coax like this seas sound in BIB, with an active crossover....food for thought maybe?

Maybe the sound of the thing tonally is not great but hey!... I don't seem to find too much on it tonally. There was some interest in it last year on some threads. Nothing in BIB though.

* power handling (continuous/programme) = 80/250 W
* resonance frequency fs = 38 Hz
* impedance R = 8 Ohm
* sound pressure level SPL = 87 dB (2,83V; 1m)
* DC resistance Re = 6,1 Ohm
* effective piston radiating area Sd = 120 cm2
* equivalent volume of compliance Vas = 27 l
* total Q factor Qts = 0,3 (Qms=1,11, Qes=0,41)
* maximum peak linear excursion vibration xlin = +/- 3 mm
* mounting diameter d = 145 mm
* overall diameter d = 176 mm
* mounting depth (not countersunk) t = 95 mm

Cheers Stroop
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Old 21st November 2006, 01:38 PM   #1795
pjanda1 is offline pjanda1  United States
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Default Re: Re: Re: I cut wood today

Quote:
Originally posted by loninappleton


But what I do have is
a roto zip device which can hold router bits. The roto
zip device also has a circle jig which I plan to use
on larger cutouts.

I do everything with a rotozip and circular saw. If you haven't purchased the rotozip circle guides yet, don't. I bought the CRCT 2, and it frustrated me so much, I called them. They sent me a CRCT 1 for free, which is marginally better. They don't work well with 3/4" ply or mdf, despite making nice holes with something like 1/2" chipboard. I find I can cut a much nicer hole free hand. It takes a bit of practice, but it is much less frustrating. I also use a 1/4" roundover bit in it for edges. I, too, hope to get a real router someday, but the rotozip is sure fast and cheap. YMMV.

Paul
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Old 21st November 2006, 02:07 PM   #1796
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Quote:
Originally posted by stroop
Hi folks,

Just wondering out aloud here. How would a modern coax like this seas sound in BIB, with an active crossover....food for thought maybe?

Maybe the sound of the thing tonally is not great but hey!... I don't seem to find too much on it tonally. There was some interest in it last year on some threads. Nothing in BIB though.

* power handling (continuous/programme) = 80/250 W
* resonance frequency fs = 38 Hz
* impedance R = 8 Ohm
* sound pressure level SPL = 87 dB (2,83V; 1m)
* DC resistance Re = 6,1 Ohm
* effective piston radiating area Sd = 120 cm2
* equivalent volume of compliance Vas = 27 l
* total Q factor Qts = 0,3 (Qms=1,11, Qes=0,41)
* maximum peak linear excursion vibration xlin = +/- 3 mm
* mounting diameter d = 145 mm
* overall diameter d = 176 mm
* mounting depth (not countersunk) t = 95 mm

Cheers Stroop
Actually, I sent Dan some dimensions for one of these a few months back -sort of budget Maxxhorn. Do you still have the dimensions Dan?
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Old 21st November 2006, 11:16 PM   #1797
stroop is offline stroop  Germany
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Hi Folks,

The other one that has had good things said about it is this ciare hx160. The driver is not big on bass, but seeing the BIB is, then maybe BIB is an ideal enclosure. I understand that it is getting good reports on some German forums.

Resonanzfrequenz: 70 Hz
Gütefaktoren(Qms/Qes/Qts): 5,14 / 0,45 / 0,42
Äquivalenzvolumen(Vas): 16 Liter
Effektive Membranfläche(Sd): 135 cm²
Antriebsfaktor(BL): 6,56 Wbm
Schwingspulenüberhang(Xmax): 1,75 mm

I've just been looking around at some drivers that maybe suitable for BIB, for fun...if it is annoying for you Scott then just say so! Especiially since you're doing all the calculations.

Cheers Stroop
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Old 21st November 2006, 11:38 PM   #1798
dmason is offline dmason  United States
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Scott

That was the PHL 1240TWX. We agreed the FE168 played 'bigger.'

This PHL would be THE 6.5" coaxial to use. I am still thinking about this one....If they are anything like the bigger PHL's, which I had recently heard in EAW midfield monitors at PowerStation in LA, they would be great. Fantastic pedigree, these things..

The $8,000.00 Maxxhorn uses exactly this PHL coaxial, and the XO could be easily found by Googling. Constantine Soo gave it a great write up in Dagogo. We could easily better that by building ...The Max-Klone... using this driver, vertical loading, and good 13X marine grade.

I will attempt to find that email...
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Old 21st November 2006, 11:49 PM   #1799
stroop is offline stroop  Germany
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Hi Dmason,

The seas coax was WP180XP (T18 RE coax)

Cheers Stroop
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Old 22nd November 2006, 02:34 PM   #1800
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I am hoping I can get cabinet specs for my Veravox drivers. I'm not positive what I will do, but hoping to get these so I have them as an option. I have a feeling these could be quite good in a BIB.

Here's a link with some questions regarding this driver and potential cabs, if anyone would care to offer anything.

Need thoughts, Veravox content...


And here are the specs for the BIB cab.

size: 18cm
db 2.8v: 93
Z: 8
Re: 5.9
Le mH: .03
Ce F: .82
Fs: 56
Vas: 33
Qms: 3.6
Qes: .58
Qts: .50
Xmax: ±1

Thanks so much for anything you'd care to offer.
Layne
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