AD435 for 435BE

[sa660]

I saw this on yahoo auction japan.
The adapter looks like a simple cone. Has anyone the dimensions for that piece.

http://page6.auctions.yahoo.co.jp/jp/auction/f57491650

Thanks,

[matsj]

Look at the box :).

mats

[Hoerninger]

1.5 inch -> 2 inch conversion horn throat adapter AD435

http://www.hifido.co.jp/photo/03/189/18997/a.jpghttp://www.hifido.co.jp/photo/03/189/18997/b.jpghttp://www.hifido.co.jp/photo/03/189/18997/c.jpg

http://www.harman-japan.co.jp/product/jblhome/435be.html
___________
Peter

[sa660]

I try to make out from the photo of box the details, but I could not read it.
I guess I only need to know if this is straight and the total length?
Can you give the dimmension of that part?

[Hoerninger]

The dimensions are not known to me.
According equation <6> found here
http://audioheritage.org/vbulletin/showpost.php?p=186821&postcount=1
there is a dependency between length and cut off frequency:

length 1 inch - 618 Hz cut off frequency
length 2 inch - 309 Hz cut off frequency
length 3 inch - 206 Hz cut off frequency
____________
Peter

[grumpy]

to match the flares at both ends, I'm calculating 1.75", front to back... (assumes
1.50" entry and 2.00" exit ... may have to adjust slightly for differences and/or gaskets
-if- it would even make any difference). At that portion of the curve, a straight wall
(conic section) appears to be a close enough approximation
(~ 0.5mm bulge in the middle would be closer ;) ). -grumpy

Err.. matching flare of 2311/2307 type horns.