diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Full Range (http://www.diyaudio.com/forums/full-range/)
-   -   Dallas II vs Kirishima (http://www.diyaudio.com/forums/full-range/213114-dallas-ii-vs-kirishima.html)

gafhenderson 22nd May 2012 03:59 PM

Dallas II vs Kirishima
 
Dallas II vs Kirishima

does anyone have the predicted plots for both these cabinets handy?

if not what would the difference between them be, apart from ease of construction?

experiences with either of these with the 206 would be appreciated.

thanks.

castorG 22nd May 2012 09:37 PM

Gafhenderson, if you don't mind, I would use your 3d to add a question to yours..

Is it possible to take off the 'head' of the dallas II, makind it a kind of dallas III?
http://2.bp.blogspot.com/_SxM_nCPR41...llas%2BIII.jpg
http://4.bp.blogspot.com/_SxM_nCPR41...allas%2BII.JPG

gafhenderson 22nd May 2012 09:49 PM

Quote:

Originally Posted by castorG (Post 3033119)
Gafhenderson, if you don't mind, I would use your 3d to add a question to yours..

Is it possible to take off the 'head' of the dallas II, makind it a kind of dallas III?
http://2.bp.blogspot.com/_SxM_nCPR41...llas%2BIII.jpg
http://4.bp.blogspot.com/_SxM_nCPR41...allas%2BII.JPG

thats exactly what i was thinking of doing!

chrisb 22nd May 2012 10:02 PM

Very pretty - in fact it already has been done with the Austin:


http://p10hifi.net/FH/images/dallas-2-kerf-core-tn.jpg


Other than the obvious significant complication of fabricating curved shapes (regardless of materials/method used), don't automatically assume that "fairing" the length of internal pathway will improve sonic performance over hard/sharper folds.

gafhenderson 22nd May 2012 10:07 PM

Quote:

Originally Posted by chrisb (Post 3033154)
Very pretty - in fact it already has been done with the Austin:


http://p10hifi.net/FH/images/dallas-2-kerf-core-tn.jpg


Other than the obvious significant complication of fabricating curved shapes (regardless of materials/method used), don't automatically assume that "fairing" the length of internal pathway will improve sonic performance over hard/sharper folds.

i've found a local man with one of those electronic shape cutter contraptions who will give me very good rates, so whichever design + driver i finally commit to, it actually will work out easier for me to have it fabricated in single stacked sheets. the curved shape may also allow it to pass unnoticed under the WAF radar.

chrisb 22nd May 2012 10:23 PM

Quote:

Originally Posted by gafhenderson (Post 3033159)
i've found a local man with one of those electronic shape cutter contraptions who will give me very good rates, so whichever design + driver i finally commit to, it actually will work out easier for me to have it fabricated in single stacked sheets. the curved shape may also allow it to pass unnoticed under the WAF radar.


if you're talking about fabricating a front mouthed horn with a pretty enough finish to pass unnoticed under the WAF-dar using the stacked lamination ( "layertone" ) method, you might want consider not only the substantial time involved in prepping for a decent paint or veneer finish, but also the outrageously poor material yield on a shape such as this one, that has very few parts that can be nested

the electronic shape cutter contraption ( I assume you mean CNC) could be much better utilized in fabricating jigs around which Kerf-core, rubber ply, etc could be wrapped

if it sounds like I'm not a fan of this technique, which often employs MDF - yep, and no apologies for that

castorG 22nd May 2012 10:38 PM

Chrisb, what do you think abouy simply taking off the head of the dallas II? I guess it want be detrimental from a sound point of view, since the dallas III does the same thing.

Ervin

gafhenderson 22nd May 2012 11:03 PM

Quote:

Originally Posted by chrisb (Post 3033182)
if you're talking about fabricating a front mouthed horn with a pretty enough finish to pass unnoticed under the WAF-dar using the stacked lamination ( "layertone" ) method, you might want consider not only the substantial time involved in prepping for a decent paint or veneer finish, but also the outrageously poor material yield on a shape such as this one, that has very few parts that can be nested

the electronic shape cutter contraption ( I assume you mean CNC) could be much better utilized in fabricating jigs around which Kerf-core, rubber ply, etc could be wrapped

if it sounds like I'm not a fan of this technique, which often employs MDF - yep, and no apologies for that

all i know is that it's a laser, and it needs to be special treated wood that is suitable for use with lasers.

i'd not pay the extra expense for practise boxes that i'm messing around with now but for the finally design i'd be happy to pay for it.

sippy 22nd May 2012 11:43 PM

Just a thought...........
Think of a ring of wood, multiples stacked to make a cylinder, to cut this using cnc / laser is wasteful........
Divide each ring into segments, glue the segments so the joints at say 45deg to each other, from curves to strait sections can be formed as 'J' sections, the majority of the straits can then be cut on a table saw. Yes its slightly more complex to make / glue up a horn enclosure in this manner.
Thinking about it a little more, one could have just the curved sections cnc/laser'd and flat material joined in to make the strait sections........BIG saving in cost there.

chrisb 23rd May 2012 06:53 PM

Quote:

Originally Posted by castorG (Post 3033197)
Chrisb, what do you think abouy simply taking off the head of the dallas II? I guess it want be detrimental from a sound point of view, since the dallas III does the same thing.

Ervin


I can't see any problem with that


All times are GMT. The time now is 11:07 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2