OB "omni" experiment

Kjeldsen · 09:02 PM

I have begun my experiment, very much inspired by Graaf and Tinnitus's flooders and OB because I have never tried it before.

I will have one Markaudio CHR-70 and four 10" peerless woofer per speaker. I have made prototypes, but still haven't had any sound yet. The prototypes only have two woofer, and are only ment to give the thumbs up or down for further experiments.

First shot of the not very professional prototypes. They are made of scrap wood and corrugated.

graaf · 30th October 2011, 09:55 PM

Quote:

Originally Posted by Kjeldsen

I have begun my experiment, very much inspired by Graaf and Tinnitus's flooders and OB

check out also bare 12'' coaxial (whizzer cone FR) driver experiments with measurements by Radugazon here
from page 67 - post #669 and on:

good luck!

dave_gerecke · 31st October 2011, 05:21 AM

I like the workbench in between the speakers!

Kjeldsen · 31st October 2011, 09:59 AM

Quote:

Originally Posted by dave_gerecke

I like the workbench in between the speakers!

And childrens books are very good to adjust for the right angle

And the pink material gives a very black background, and more space, depth etc.

Maybee I should make an ebay shop, and sell som tweaks. Winnie the Pooh really do wonders to overall sound.

graaf · 31st October 2011, 10:15 AM

not to mention Pippi Långstrump

too bad so few people here understand this....

Kjeldsen · 31st October 2011, 10:24 AM

Back to business: I need to get some cables and cable shoes. I've got some spare amps on stock (one NAD 3100 and one NAD 2100) and a MiniDSP with advanced plugin a mic and REW, so I hope there will be some progress during the next few days.

Kjeldsen · 8th December 2011, 06:25 AM

Project gor a little delayed. I don't use analogue output from my minidsp, and forgot that the outputs were hidden away in the case. I have build a new case, but now need an angled USB cable. I also thought I had two NAD amps. I knew one of them periodically don't play in left channel (got for free). But there was a lot of hum and I couldn't test with this amp, so only one speaker have been testet. Since I can't tweak the miniDSP untill I have the angled USB cable, I have only the tone controls to use, on my NAD amp.

Suprisingly I was able to get a pretty flat respons from 35 to 300 Hz, with Bass eq, Bass control and loudness on. I also tweeked with eq in foobar. I sounded horrible, but prooved that I can get plenty of low end with these Peerless woofers.

I have one measurement of woofer section with two 10" Peerless woofers. Final system will have four per speaker. I will post later today (European time)

el`Ol · 8th December 2011, 08:45 AM

I has open back enclosures with fullrange on top. Making it more and more open while destroying it gave more and more dipole sound and killed the realistic imaging of the original construction.

Kjeldsen · 8th December 2011, 02:55 PM

OB sub.jpg

tinitus · 8th December 2011, 03:33 PM

Quote:

Originally Posted by Kjeldsen

I have begun my experiment..........

great

actually, the other day a friend asked me to design a speaker his wife wont notice moving in
and worse, no visible electronics either

so, the 'invisible' powered speaker

15" woofer, and 8" fullrange(Burro), and Hypex plateamps

30th October 2011, 08:57 PM	#1
Kjeldsen diyAudio Member Join Date: Dec 2003 Location: Randers, Denmark	OB "omni" experiment I have begun my experiment, very much inspired by Graaf and Tinnitus's flooders and OB because I have never tried it before. I will have one Markaudio CHR-70 and four 10" peerless woofer per speaker. I have made prototypes, but still haven't had any sound yet. The prototypes only have two woofer, and are only ment to give the thumbs up or down for further experiments. First shot of the not very professional prototypes. They are made of scrap wood and corrugated. Last edited by Kjeldsen; 30th October 2011 at 09:02 PM.

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31st October 2011, 05:21 AM	#3
dave_gerecke diyAudio Member Join Date: Dec 2007 Location: Vermont	I like the workbench in between the speakers!

31st October 2011, 10:15 AM	#5
graaf diyAudio Member Join Date: Jun 2007	not to mention Pippi Långstrump too bad so few people here understand this....

31st October 2011, 10:24 AM	#6
Kjeldsen diyAudio Member Join Date: Dec 2003 Location: Randers, Denmark	Back to business: I need to get some cables and cable shoes. I've got some spare amps on stock (one NAD 3100 and one NAD 2100) and a MiniDSP with advanced plugin a mic and REW, so I hope there will be some progress during the next few days.

8th December 2011, 06:25 AM	#7
Kjeldsen diyAudio Member Join Date: Dec 2003 Location: Randers, Denmark	Project gor a little delayed. I don't use analogue output from my minidsp, and forgot that the outputs were hidden away in the case. I have build a new case, but now need an angled USB cable. I also thought I had two NAD amps. I knew one of them periodically don't play in left channel (got for free). But there was a lot of hum and I couldn't test with this amp, so only one speaker have been testet. Since I can't tweak the miniDSP untill I have the angled USB cable, I have only the tone controls to use, on my NAD amp. Suprisingly I was able to get a pretty flat respons from 35 to 300 Hz, with Bass eq, Bass control and loudness on. I also tweeked with eq in foobar. I sounded horrible, but prooved that I can get plenty of low end with these Peerless woofers. I have one measurement of woofer section with two 10" Peerless woofers. Final system will have four per speaker. I will post later today (European time)

8th December 2011, 08:45 AM	#8
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	I has open back enclosures with fullrange on top. Making it more and more open while destroying it gave more and more dipole sound and killed the realistic imaging of the original construction.

8th December 2011, 02:55 PM	#9
Kjeldsen diyAudio Member Join Date: Dec 2003 Location: Randers, Denmark	OB sub.jpg

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