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Old 1st December 2012, 08:43 AM   #31
solhaga is offline solhaga  Sweden
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Quote:
Originally Posted by solhaga View Post
I was sitting in the third row to the left right .
Sadly, I couldn´t see him pluckin´his guitar from that angle.
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Old 4th December 2012, 10:00 AM   #32
solhaga is offline solhaga  Sweden
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Default Got focused

So I managed to build a couple of FAs:

Click the image to open in full size.

From this angle nothing seems to have changed, but instead of CBTs it is now concave focused arrays.

Measurement from sweet spot:

Click the image to open in full size.

Red curve is somewhat 20 dB higher in reality, the elements are couple 4 and 4 in parallell and then in series.

Blue curve with resistors (120 ohm was what I could get on a Sunday afternoon) in series with each element.
All the elements plus their resistor is then coupled in parallell.
I will mount 56 ohm instead of the 120 when I get them.
The humps at 150 Hz, 650 Hz and 1500 Hz are candidates for some EQ:ing;
XO will probably be at 250 Hz so I don't bother with the one at 140 Hz.

So any comments on the two curves?
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Old 9th December 2012, 01:10 AM   #33
Illusus is offline Illusus  Canada
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Surely, you had to have had listened to music through both CBT and FA set ups. Which did you enjoy more and why?
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Old 9th December 2012, 11:34 AM   #34
solhaga is offline solhaga  Sweden
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It was very hard to get the CBTs integrated with the woofers, it was just a bass blur around the XO. Above the XO, the sound wasn't great either.
So having multiple identical sound information arriving with different timing to your sweet spot isn't a great idea; I don't understand why one should want to have CBTs in a home environment.

The FA setup, however, is giving my dipole ribbons a real match. Waving my head around didn't produce any awkwardness either. So perhaps the sweet spot isn´t that small.

I just finished replacing the 120 ohm series resistors with 56 ohm and have also done some paint job and haven't had the time yet to really listen to the FAs.
I haven't done serious EQ-ing either, so I have to come back with some feedback.
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Old 15th December 2012, 09:45 AM   #35
solhaga is offline solhaga  Sweden
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Painted the FAs black to match my subs:
Click the image to open in full size. Click the image to open in full size.

Finally did the EQ:ing. Looking at the blue curve in the post above, I never understood the dip around 1 kHz. Does anyone have a teory?

Anyway, everything is there: soundstage, lows and highs, you name it.
This will be my setup for a while, at least over the holidays

Next project will be to make five HT satellites out the 18 E60s I got left.
I'll be doing the fast way, so they might turn up in this thread as well.
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Old 15th December 2012, 10:29 AM   #36
xrk971 is offline xrk971  United States
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Nice job! Looks fantastic. Can this be done much cheaper a la Melotheory with vifa tc9fd's? I don't dare ask what all those Jordans cost...

Last edited by xrk971; 15th December 2012 at 10:45 AM.
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Old 15th December 2012, 10:32 AM   #37
solhaga is offline solhaga  Sweden
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Melo Theory actually inspired me in the first place.

Mine's got an open back though, that is they are dipoles.

Last edited by solhaga; 15th December 2012 at 10:35 AM.
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