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How about quarter round moulding for internal corner bracing?
How about quarter round moulding for internal corner bracing?
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Old 8th July 2016, 04:41 PM   #11
jimbro is offline jimbro  United States
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That driver only goes up to 10k. What are your expectations and application?
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Old 8th July 2016, 04:51 PM   #12
chrisb is offline chrisb  Canada
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No - I tend to always countersink the driver basket for flush mounting - what I meant was don't recess the front panel so the sides / top/bottom are proud, which is something often seen with inset grille frames. That would generate a lot of diffraction issues


Dadoes for insetting back and front panels would require very little extra effort for an experienced woodworker, which along with biscuits or continuous splines along the beveled joints would significantly strengthen the cabinet.

I build a lot of small boxes from 15 & 18mm plywood myself, and on very small FR drivers such as the usual candidates for something like this, even 12mm is sturdy enough - but with that material I generally use simple butt joinery & dadoes

Don't place bracing members, dowel or otherwise at exactly the middle of any panel, and add a short, slightly larger diameter brace between the magnet and back panel - test fit with driver's gasket properly compressed


I've never heard the Auratone, so can't speak to its mythical popularity - it is a tiny, potentially cute little box.

Have fun with the build

edit:
ps per jimbro's comment - there are probably other candidates for drivers for such a little project that would have much more extended HF response - Fostex, TangBand, Fountek, Vifa, ScanSpeak, Dayton, Mark Audio to name just a few. in such a very small sealed cabinet, you should also be prepared for limited bass response without use of massive EQ and power.
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Last edited by chrisb; 8th July 2016 at 04:55 PM.
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Old 8th July 2016, 05:46 PM   #13
oidua5 is offline oidua5  Canada
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Thanks again for your thoughts. As with the orig. Auratone, the speakers are meant to be a mids-focused "real world" mixing reference. The idea is that almost all playback systems have mids, so if your mix translates on Auratones, it improves the chances that the mix will translate in a wide variety of settings. Of course the single driver also means no cross-over distortion.
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Old 8th July 2016, 05:48 PM   #14
oidua5 is offline oidua5  Canada
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The port-free design may also have something to do with the Auratone's popularity. These waterfall plots show it's unusually even decay, similar to another time-honored mix ref speaker, the NS-10...

Click the image to open in full size.
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Old 8th July 2016, 05:49 PM   #15
oidua5 is offline oidua5  Canada
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For comparison, have a look at the low end decay of these other pro mixing monitors...

Click the image to open in full size.
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Old 8th July 2016, 07:08 PM   #16
chrisb is offline chrisb  Canada
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fair enough - as you might find discussed in other threads, even the most careful measurements only tell part of the story - but if making a choice on published graphs only - i.e. having heard none of them, I'd be inclined to the ATC SCM20A as the "best" compromise from the group shown
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Old 9th July 2016, 08:56 AM   #17
ewollowe is offline ewollowe  Australia
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I believe this is the same driver as used in the original?

https://www.amazon.com/GRS-Full-Rang.../dp/B00DVO1OYS

I owned a set of AURATONE 5S before, a garage sale bargain at $5. They had a nice clear sound, no bass.

Different shape to the typical cube.

http://medias.audiofanzine.com/image...-5s-200438.jpg
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Old 10th July 2016, 01:39 PM   #18
BYRTT is offline BYRTT  Denmark
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How about quarter round moulding for internal corner bracing?
Quote:
Originally Posted by oidua5 View Post

For comparison, have a look at the low end decay of these other pro mixing monitors...
Agree post 14 verse post 15 has nice decay and that should lead to good clear midrange but also as ewollowe note there is really no bass amplitude. Reason those good waterfall think is low Q variation (roll off) from ideal flat response in minimum phase domain where the higher the Q variation leads to ringing tails, exactly the debate why sealed sometimes can be superior to ported. Imagine those waterfalls are anechoic or near field data so to replicate the fine data real world for final build remember to use it as near field speaker because as i see it as soon as speaker has to cooperate with room then responses from post 15 examples probably integrate better than post 14 will do.

Below picture 1 show some data that help see how lower Q variation is superior to high Q variations.

Picture 2 show example typical room mode data from a free Jeff Bagby spreadsheet verse the 5 times band passes from picture 1 and it looks obvious that green will integrate relative flat with room verse orange that will get a dip that will lead to a new ringing tail in waterfall compared when listening orange in near field.

Picture 3 data is all 2. order BW roll offs and think show the lower and flat extension one can get from speaker system all included at listening position the better the waterfall will show clear mids and audio band data from 20-20kHz (ringing tails get moved so low in frq they out of audio tracks area of energy).
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File Type: png 91.png (76.4 KB, 53 views)
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Last edited by BYRTT; 10th July 2016 at 01:48 PM.
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