Ravener,
Looks good. What is your reason for having the back throat leading to a spiral that goes to a closed end? Are you trying to locate the driver at a location that essentially makes the horn appear longer by having an offset driver chamber between a closed end and an open end? What is your total path length by the way? One final note, if foam core boards come in the 20x30 in size where you are (probably not as you are in Singapore), reducing the 21 in dimension to 20 in allows you to fit it on shorter length of raw stock.
Looks good. What is your reason for having the back throat leading to a spiral that goes to a closed end? Are you trying to locate the driver at a location that essentially makes the horn appear longer by having an offset driver chamber between a closed end and an open end? What is your total path length by the way? One final note, if foam core boards come in the 20x30 in size where you are (probably not as you are in Singapore), reducing the 21 in dimension to 20 in allows you to fit it on shorter length of raw stock.
X,
Nothing too complicated actually, I just don't want to change the shape of the Fibonacci spiral by too much, thereby tapering off the other end rather than remove it altogether, may be hoping that the closed end would act like a transmission line?
Anyway, the drivers that i'll be using looks strangely similar to this one The Madisound Speaker Store
Nothing too complicated actually, I just don't want to change the shape of the Fibonacci spiral by too much, thereby tapering off the other end rather than remove it altogether, may be hoping that the closed end would act like a transmission line?
Anyway, the drivers that i'll be using looks strangely similar to this one The Madisound Speaker Store
If the Vifa TC6FD is anything like its big brother the TC9FD, you are in good hands. I have been meaning to buy a couple of these to try in my 14 inch Cornu. Looking forward to seeing your build and hearing your listening impressions.
IG,
Thanks for the link - just what I was looking for! Looks like a perfectly fun thing to make out of foam core. 😀
I wonder if that's a typo. The $2 driver I have is the AS3
Aura Sound 3" Full Range Speaker 16ohm 7 5 Watt 135Hz Neodymium Magnet Aurasound | eBay
this is the real NS3.
The Madisound Speaker Store
I am talking about this one, I think it is what you got Cal.
The Madisound Speaker Store
Price went up to $2.50 ea.
OK, I wonder if the difference is simply alnico - A and neo - N. They appear the be similar otherwise. I seem to have the A version.
Likey because enuff people bought boxes of 50 (i bought 100) that they have less than 50 left.
dave
Than Madisound has the number wrong... now you gonna go make me look at the carton.... hang on.
back... AS3
dave
Whoa, nice job xrk! I was thinking of trying something like that but am intimidated by the side cuts to get the curvature.
Thanks Carlp,
I had no idea how to do it at first. So I made the tractrix profile gauge board (the smaller piece). I cut an approximate panel and curved and glued to gauge. Then projected a 45 deg cut straight from above by eye and traced intersection with pencil. Then it still took a ittle after the fact trimming to get the two segments to line up and make a seal. Definitely make a play prototype first to learn technique. It should work though.
I had no idea how to do it at first. So I made the tractrix profile gauge board (the smaller piece). I cut an approximate panel and curved and glued to gauge. Then projected a 45 deg cut straight from above by eye and traced intersection with pencil. Then it still took a ittle after the fact trimming to get the two segments to line up and make a seal. Definitely make a play prototype first to learn technique. It should work though.
I wonder if it makes any difference? They sound fine for a $2 driver so I'm not worried.
Photos of Pair of FIB's w Soundclip
Details of Flatter is Better BIB build in the Terry Cain BIB thread. I thought since it is a foam core build, better to post final pix and sound clip here though.
They sound great and have the ability to fill the room with some nice bass. I like how they ended up looking too. I just need to decorate them now.
Details of Flatter is Better BIB build in the Terry Cain BIB thread. I thought since it is a foam core build, better to post final pix and sound clip here though.
They sound great and have the ability to fill the room with some nice bass. I like how they ended up looking too. I just need to decorate them now.
