One of Ray's pics as a test:
http://img9.imagevenue.com/img.php?loc=loc597&image=03756_BIB_in_Backyard_122_597lo.JPG
http://img9.imagevenue.com/img.php?loc=loc597&image=03756_BIB_in_Backyard_122_597lo.JPG
.....and another:
http://img126.imagevenue.com/img.php?image=03748_BIB_beside_Eames_Chair_122_393lo.JPG
RC, you have mail.....
http://img126.imagevenue.com/img.php?image=03748_BIB_beside_Eames_Chair_122_393lo.JPG
RC, you have mail.....
Dave,
The cones are accurate in the first picture...the one in the backyard. The picture next to the Eames chair is not the true color.
GM,
I still can't make it work. I get the link to copy but it will not work after I paste it on the message area. Sorry to be a pest but can you give me a little more detail on the procedure?
Thanks,
Ray
The cones are accurate in the first picture...the one in the backyard. The picture next to the Eames chair is not the true color.
GM,
I still can't make it work. I get the link to copy but it will not work after I paste it on the message area. Sorry to be a pest but can you give me a little more detail on the procedure?
Thanks,
Ray
gychang said:
Over at the craft store (Ben Franklin's etc) they
have a variety of plaques for people who want to
paint them or mount (small) fish. 🙂
I found some eliptical ones of decent size at
Hobby Lobby on sale. These are USA stores but I imagine
that this type of stuff is available all over.
I've also seen sets of eliptical 'trivets' as well as
interesting shaped and inexpensive bread boards which
could be adapted without a lot of cutting.
loninappleton said:
do u know of any web site where they display the item so I can view it? You are suggesting these board can be mounted with the center cut out ?
thanks,
gychang
loninappleton said:
that's very helpful, I will check out the craft stores in Irvine, CA and see if I can find one, will save me buying a router and extra work...
gychang
Scottmoose said:
Hi Scott,
As I have find in my basement an old pair of ARZ6608 😀
I simulated both combinations - floor-firing - which seems to have more bass in 80-150 region but lot of irregularities after 100Hz (driver position ratio set to 0.3) and top-firing (driver position ration = 0.191) which is rather nice (I've got same graph as you shown). I used my old copy of ML TQWT.mcd (I hope it's still legal to use it…) with params :
Fd := 71.4 Hz
Re := 7.5 Ohm
Lvc := 0.5 mH
Bl := 5.2
Sd := 189 cm2
Vad := 27 liter
Qed := 1.17
Qmd := 3.12
L:= 95.6 in (70Hz)
Xi := 0.3 (bottom oriented or 0.198 top oriented)
S0 := 0.001 Sd
SL := 4.1 Sd
Density := 0.0001 lb ft-3
R port := 6.19 in
L port := 0.0001 in
Maybe I will try to build it but I can't decided which one - top or bottom firing? Do you have any information how original AcuHorns is build- It's not clear from their site.
From some pictures I've subsequently found, I suspect it's a BVR or TQWT type cabinet venting down low to the rear. With these drivers, I'd suggest floor-venting for a BIB as Fs is a little high, which would put the terminus too low in-room.
vladimir said:
Greets!
How can you sim floor loading with WSs that are based on half space loading (speaker flush mounted in an infinite wall)? Even then the WS's calcs are simplified in that the vent's terminus is at the same x/y point as the driver and why the HF portion of the plot gets increasingly off.
Since these were in the public domain, we can legally use or copy/share them, though I prefer not to do the latter.
GM
I was wondering that myself. You been modifying those sheets? Or are you just adjusting the driver position along the line? If the latter is the case, you will get plenty of differences without ever changing anything else.
GM said:
Hi,
no I haven't simulate floor loading - I only changed the position of the driver (I use only mathacad explorer so I don't think that I'm able to modify anythink in the WS). Btw, Isn't floor loading exactly the half-space situation ?
I think I might have found a suitable driver for a subwoofer BIB..
8 inch driver (fairly low sd for a smaller overall size).
VERY high (or low depending on your viewpoint) mechanical compliance. (..prob. should say very compliant - but that sounds a little redundant.)
LOTS of excursion.
LOW fs.
Fairly low cost.
Ta' Da!:
http://www.mcminone.com/product.asp?catalog_name=MCMProducts&category_name=&product_id=55-2421
of course the power could come from this:
http://www.mcminone.com/product.asp?catalog_name=MCMProducts&product_id=50-6272
8 inch driver (fairly low sd for a smaller overall size).
VERY high (or low depending on your viewpoint) mechanical compliance. (..prob. should say very compliant - but that sounds a little redundant.)
LOTS of excursion.
LOW fs.
Fairly low cost.
Ta' Da!:
http://www.mcminone.com/product.asp?catalog_name=MCMProducts&category_name=&product_id=55-2421
of course the power could come from this:
http://www.mcminone.com/product.asp?catalog_name=MCMProducts&product_id=50-6272
I've got one of the 55-2421s. They are a clone of the Tang Band W8-740C. The Tang Band is better built. Don't trust MCM's specs. The 55-2421 is more like Fs 30hz, Vas 40 liters, Qts .3 They are an amazing driver for the money. I'm using one in a tube a la El Pipe-o. It works decently, but is not ideal. I built a friend an EBS enclosure with a passive radiator that worked really well for its size and cost.
I too have been curious to see a BIB for them, though I imagine it would need to be mass loaded due to the low Fs.
Paul
I too have been curious to see a BIB for them, though I imagine it would need to be mass loaded due to the low Fs.
Paul
Not necessarily; you don't have to tune to Fs. It just means we won't be going quite as low, but when you're reaching the low 20Hz regions a little more here or there doesn't make a whole lot of difference. 😉 Mass loading would be an interesting alternative though. I'll have a look at some point & see what can be done.
gychang said:
I was talking about fish earlier. Perhaps any taxidermy
outfits have mounting blanks that would give some
size options too.
Store names are Ben Franklin, Hobby Lobby plus any
local businesses.
The Home Depot has some (albiet flimsy) round
'coasters' for flower pots of various sizes. Those
are made out of fiberboard.
Eventually you'll want a router though. 🙂
Scottmoose said:
I was thinking something like GM's design for the Assassin 10 might work.
Paul