this has already been answered - the BIB is a driver chamber-less folded BLH, designed for boundary (ceiling / floor) loading
I've yet to build a pair myself, but judging from the drawings, as has been stated above, they're about as simple a horn as you could build - a five sided box with an angled divider and a hole for the driver.
The EL70 was a custom OEM driver for Bob Reimer at CSS, but of course will likely bear a strong sonic family resemblance to other paper cone drivers of the same physical dimensions with Mark Audio labeling. Has anyone heard a direct comparison between both in approximately identical enclosures to comment?
I think there is consensus that the EL70 has distinctly greater output in the lowest octave. As to the question of "overall sound quality", dare I say that regardless of measurements, that's a far more subjective issue. I happen to prefer the EL70 to the CHR70, but it's not simply a matter of paper vs metal; - the last 3 sets of Jordan labeled products I've heard did nothing for me (granted one pair of JX92 had suffered some abuse), but the Alpair 7 and 12 are on my short list of favorite & affordable full range drivers
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Now it is a little bit more clear. Another "frugal" horn?
I suspected that looking at the quite double Vas in respect to the metal cone ones, and the slightly bigger vs the paper brother, but that is maybe only by chance.
Thanks a lot for the precise answers.
effebi
Yes, a truly frugal horn. Very easy to tune if you leave the top open (you'll most likely want to do the floorfiring one).
Just get your local woodshop to cut the twelve MDF pieces, glue them together. Buy an adjustable cheap hole cutter for the driver hole and a rasp to bevel the inside. Wrap the whole thing in spray glued felt, in colour of you choice, for a nice and easy finish that also improves the sound a bit.
Even though it's very simple, some truly magnificent speakers have been build on the simple concept and very expensive ones too.
Just get your local woodshop to cut the twelve MDF pieces, glue them together. Buy an adjustable cheap hole cutter for the driver hole and a rasp to bevel the inside. Wrap the whole thing in spray glued felt, in colour of you choice, for a nice and easy finish that also improves the sound a bit.
Even though it's very simple, some truly magnificent speakers have been build on the simple concept and very expensive ones too.
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Thanks for the precise infos.
Now the link works (before didn't somehow) and i can see clearly. Since I may need a little more power is there any way to do it with two drivers each?
BTW the Tang Band looks fine, but it is out of budget at the moment.
effebi.
actually, originally (or re ?) introduced to the DIY community by the wonderful and sadly missed Terry Cain, on James Melhuish's former FullRange Driver Website (in early 2001 IINM)
Single Driver Website
I had a chance to hear a pair of Terry's BIB enclosures* at VSAC2001 - a pair of Fostex 6" fullrangers driven by George Wright 45 Triode monoblocks, in what can only be described as a personal watershed moment.
* edit - also a pair of gorgeous BLH of the Nagaoka variety, with lathe-turned "supra-baffles" - the BIBs demonstrated undeniable bang for the buck, but the big horns (later evolved into BEN - Big e Nuff? 😎) were a whole 'nother world of performance and craftsmanship to aspire to
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Being that the BIB is a folded horn it may have enough chutzpa with one driver compared to the BLR cabinets but I can't answer that. Perhaps Godzilla could weigh in?
What ever you decide, just make sure to have plenty of fun on your quest🙂
Well, being a total beginner, I believe at the end it is better to start with something easy and proven.
I like those "castle" design with dual EL70s, on on side and one on top.
I believe I can get the wood cut on local shops, but then I have two questions:
1)Baltic birch stuff is unheard here (even if translated as as "Multistrato di Betulla Baltica"🙂).
May I use 19 mm MDF or 25 mm solid (pine) wood? The latter seems to me very light and weak altough😕.
2)I can work pretty well with my power alternate saw, but I have no idea how the people here make those perfect routed holes for the drivers. Is there any special tool to do that?Please do not give me name that I can't translate, a picture may help.
3)Is it a viable alternative to mount the driver on the front baffle with a rough hole and the cover everything with a nice hardwood baffle cover?
Thanks
effebi
I like those "castle" design with dual EL70s, on on side and one on top.
I believe I can get the wood cut on local shops, but then I have two questions:
1)Baltic birch stuff is unheard here (even if translated as as "Multistrato di Betulla Baltica"🙂).
May I use 19 mm MDF or 25 mm solid (pine) wood? The latter seems to me very light and weak altough😕.
2)I can work pretty well with my power alternate saw, but I have no idea how the people here make those perfect routed holes for the drivers. Is there any special tool to do that?Please do not give me name that I can't translate, a picture may help.
3)Is it a viable alternative to mount the driver on the front baffle with a rough hole and the cover everything with a nice hardwood baffle cover?
Thanks
effebi
Columbus Egg!
BTW do you know any EU available brand (Wolfcraft, B&D, Bosch, etc. that makes it?
Thanks
effebi
Wow, that's smart!
BTW do you know any EU available brand (Wolfcraft, B&D, Bosch, etc. that makes it?
Thanks
effebi
The only place I've seen these in Europe so far is here:
Circle Cutter
They do international shipping unfortunately I can't tell you anything about their shipping policy, since I usually just pick things up at their store.
Circle Cutter
They do international shipping unfortunately I can't tell you anything about their shipping policy, since I usually just pick things up at their store.
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