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Old 1st April 2018, 06:44 AM   #51
solhaga is offline solhaga  Sweden
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Join Date: Jun 2009
Location: Värsta Götaland
Mounted and measured:

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With not yet fully optimized back pole pieces and only taped membrane sides:

Click the image to open in full size.

SPL 99 dB @ 1 Watt, 2nd harmonic -45 dB (~0,5 %) and 3rd harmonic -59 dB (~0,1 %).

Intended frequency range of the mid membrane is 350 Hz to 3400 Hz with -24 dB/octave filters.
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Old 1st April 2018, 06:55 AM   #52
TNT is offline TNT  Sweden
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Join Date: Apr 2003
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Impressive!!!

//
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More distortion to the people!
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Old 10th April 2018, 01:39 AM   #53
Jamii is offline Jamii  Australia
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Join Date: Apr 2010
Location: South Australia
You're a certified genius. I wish I had the skills to do the CAD & 3D prints like this! The distortion plots are very, very impressive. Do you plan to cross this over to a woofer for the midbass?
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Old 10th April 2018, 05:17 AM   #54
solhaga is offline solhaga  Sweden
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Join Date: Jun 2009
Location: Värsta Götaland
Thank you Jamii.
I've learned a lot from a fellow countryman of yours and his Youtube channel Maker's Muse.

Here are the planned cross over frequencies:

CABS : 10 - 100 Hz
Woofer : 40 - 350 Hz
Mid: 350 - 3400 Hz
Tweeter: 3400 -20 kHz

The four loudspeakers for CABS have AE's TD15H and so does the two woofers.
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Old 12th April 2018, 05:49 PM   #55
solhaga is offline solhaga  Sweden
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Join Date: Jun 2009
Location: Värsta Götaland
Mounting of the tweeters with back pole pieces bowed down so they are near the membrane:

Click the image to open in full size.


Time for the first listening test!
But first some basic DSP settings:

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I will listen to this a couple of days before I start measuring, perhaps the individual levels needs to be adjusted.
First impressions though is that the dispersion now is good in the high frequencies and that the music fills the whole room.

So this is SLAM! in the listening room:
Left:

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Right:

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Close up left:

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Still have some cosmetics to take care of; the gray gaffa tape is not fun to look at.
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