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Mini Karlsonator (0.53X) with Dual TC9FD's
Mini Karlsonator (0.53X) with Dual TC9FD's
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Old 3rd April 2014, 10:37 PM   #551
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
My next speakers will be cream colored painted over wood
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Old 4th April 2014, 08:44 AM   #552
BL21DE3 is offline BL21DE3  Scotland
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Very nice build there Francisco.

Having seen all these builds, I've got the urge to give the 0.4x Mini Karlsonator a go.

Plus one of my cats took an unhealthy interest in the speaker cable from one of my Cornu cabinets which resulted in it meeting the floor via the edge of the TV stand, thankfully the driver was unscathed but the cabinet less so , so maybe wall mounted speakers are not such a great idea around my furry demolition team .

I've put together the dimensions shown in the attachments and was wondering if someone who's built one could give them a quick eyeball/sanity check before I start cutting.
Attached Images
File Type: png Karlsonator_04x_Print.png (30.0 KB, 21678 views)
File Type: png Karlsonator_04x_Slot.png (24.6 KB, 2770 views)
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Old 4th April 2014, 01:01 PM   #553
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Blaides,
Nice drawing there! Looks good just a few comments:
1. you might want to try Grandcalmar's method of using one long piece for the front baffle with driver all the way to the internal divider. Score lines and fold and add glue to folds internally.
2. Make the K-aperture slot width wider - start at about 0.2 in wide.
3. Don't take the K-aperture to full width at bottom but truncate to leave about 0.25 in flat for durability.
4. If you have 4 drivers I recommend the 0.53x scale. Not too much more effort to make, but big payoff in sound difference as it has deeper bass extension and is four times as loud for same amp drive voltage.

The 0.4x sounds very nice and is good for smaller rooms and desktop use but the 0.53x, as Fran discovered, can fill a huge room with great sound.

Good luck!
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Old 4th April 2014, 01:23 PM   #554
BL21DE3 is offline BL21DE3  Scotland
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Quote:
Originally Posted by xrk971 View Post
Blaides,
Nice drawing there! Looks good just a few comments:
1. you might want to try Grandcalmar's method of using one long piece for the front baffle with driver all the way to the internal divider. Score lines and fold and add glue to folds internally.
2. Make the K-aperture slot width wider - start at about 0.2 in wide.
3. Don't take the K-aperture to full width at bottom but truncate to leave about 0.25 in flat for durability.
4. If you have 4 drivers I recommend the 0.53x scale. Not too much more effort to make, but big payoff in sound difference as it has deeper bass extension and is four times as loud for same amp drive voltage.

The 0.4x sounds very nice and is good for smaller rooms and desktop use but the 0.53x, as Fran discovered, can fill a huge room with great sound.

Good luck!
Thanks for the advice.

1) I've already factored in Grandcalmar's idea for the front baffle into my build. I drew everything as separate pieces in my plans so I could make sure they were all in the right places and get the measurements etc.

2) + 3) Ok, back to the drawing board with the K-slot. Though this was the area of the build that I wasn't 100% sure of.

4) I only have 2 TC9FD's at the moment, but if I like the 0.4x I may well look to order more and build the 0.53x.
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Old 4th April 2014, 01:53 PM   #555
bcmbob is offline bcmbob  United States
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Couldn't resist - I firmly believe this is where Mr. X is leading us all - eventually
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File Type: jpg Image-B3E976ECE9A611D8.jpg (44.6 KB, 2304 views)
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Last edited by bcmbob; 4th April 2014 at 01:55 PM.
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Old 4th April 2014, 04:03 PM   #556
BL21DE3 is offline BL21DE3  Scotland
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Xrk971,

Here is my second attempt at the K-slot for my 0.4x Karlsonators, taking on board the suggestions you made. Any better?
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File Type: png Karlsonator_04x_slot_v2.png (35.2 KB, 2252 views)
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Old 4th April 2014, 04:21 PM   #557
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Blaides,
Looks great. Start cutting! Here is a little something for you - I just recorded this on my 0.4x Karlsonators at the listening position on my computer desk. Powered by a TPA3116D2 amp running full range from a flac file. Sounds great! The clip is a compressed mp3 at 160kbit so will not sound anywhere as good as the real thing but a close approximation. I can see that it is hitting 75 Hz on the bass extension when I look at the spectrum. Not too bad...
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File Type: zip 0.4x-Karlsonator-clip-10.zip (910.1 KB, 240 views)
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Old 4th April 2014, 05:55 PM   #558
prezden is offline prezden  Canada
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I used the same single piece method and thought it worked very well. It's really quite easy to do.
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Old 5th April 2014, 12:03 PM   #559
BL21DE3 is offline BL21DE3  Scotland
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Quick question for the folks that built using the single piece method for the front baffle.

How did you handle the angled section where the baffle meets the bottom of the cabinet? (I've marked it in red on my attached image)

I was thinking of making the two sections of the baffle that hold the driver the same length, scoring/folding over, and gluing in place. Then when set cutting them to the correct angle.
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File Type: png Karlsonator_04x_baffle_2.png (26.5 KB, 2169 views)
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Old 5th April 2014, 12:40 PM   #560
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Blaides,
That sounds like a good idea. If FC panels were long enough you could make the entire speaker out of one long strip! Glue second panel for the double layer portion.
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