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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 8th January 2019, 08:13 PM   #3171
drpro is offline drpro  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
It's like those gumball machines, put a coin in and receive a piece.
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Old 12th January 2019, 04:26 PM   #3172
steefdebruijn is offline steefdebruijn  Netherlands
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Hi,

Planning to build a wooden MiniK with dual TC9FD. Was planning to use the CAD drawing from the first post using the "original, scaled by x.53" measurements. It uses 10(.1) mm wooden panels, which I can not obtain in ply here but in MDF I can.

Questions:
- Is it wise to use the original scaled model for this?
- Is it wise to use MDF instead of the normally used ply?
- Are braces necessary with the wooden version and/or especially the 10mm panel version?

I suppose I have to play with the damping material, using the hints from xrk as a starting point.

I am planning to power each driver separately (so I can use both channels of a mini class D stereo amp fed with two mono inputs).

Steef
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Old 12th January 2019, 04:48 PM   #3173
Buehgemeiste is offline Buehgemeiste
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imo mdf is fine.
it is easier to cut, but not as durable and good looking as plywood.
i'm happy with my 0.9mm ply x.53's and i used the braces and i think it was the orignal scaled model.
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Old 12th January 2019, 06:02 PM   #3174
tristanc is offline tristanc  United Kingdom
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Mini Karlsonator (0.53X) with Dual TC9FD's
Quote:
Originally Posted by twocents View Post
I think you have put in toooo much damping. Especially at the top. Looks like the damping is blocking the vent at the top. If possible, try and remove this to see if the bass improves?
Quote:
Originally Posted by xrk971 View Post
There is some adjustment possible of stuffing via driver cutout. You can also perform surgery with xacto after assembly. Cut small window and replace and glue back on later.
Quote:
Originally Posted by tristanc View Post
This is probably what Iíll have to do - totally failed in removing the foam from the top panel through the aperture... I may also cover the surgical hole and edges with sticky backed plastic to ensure a seal.
The results of my surgery... I made a square incision to the top panel, removed the foam as suggested and re-attached the square panel. Then I covered with stick backed plastic.

It has made a difference, although not a massive improvement. It is most likely the tiny output transformers, so I've another pair on the way which should have higher bandwidth.
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Old 12th January 2019, 07:51 PM   #3175
Buehgemeiste is offline Buehgemeiste
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9mm, not 0.9mm
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Old 12th January 2019, 10:30 PM   #3176
steefdebruijn is offline steefdebruijn  Netherlands
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Quote:
Originally Posted by Buehgemeiste View Post
9mm, not 0.9mm


Yeah I guessed that LOL. Considering 9mm ply then too. Where the braces necessary for the stiffness or the sonics, or did you throw them in just because?
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Old 13th January 2019, 12:11 AM   #3177
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
When building out of wood make sure you add melamine foam on the interior on all surfaces in line of sight contact with rear cone. I added a layer of foam core to the inside of my K aperture and melamine foam on the sides of the front chamber.
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Old 13th January 2019, 08:46 PM   #3178
Buehgemeiste is offline Buehgemeiste
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Quote:
Originally Posted by steefdebruijn View Post
Yeah I guessed that LOL. Considering 9mm ply then too. Where the braces necessary for the stiffness or the sonics, or did you throw them in just because?
0.9mm would have been interesting.
very lightweight.

i didn't try without braces.
They seemed to make sense....
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Old 14th January 2019, 10:31 PM   #3179
henrylarsen is offline henrylarsen  Denmark
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Just finished my first .53X set with two Faitalpro's. First tests - with my red king class a tube amplifier is quite amazing - I have not tried karlsons before, and they really shine in their way of just engaging with the music and the room. I first tried my little Denon amplifier, but a good amplifier really seems to make a difference on this really cheap loudspeakers. I used Muddjesters nice score-andfolds plan, with a slight modification to make room for the faitals in the bottom.
I ordered two more Faitals to prepare for a set of the small ones ..
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Last edited by henrylarsen; 14th January 2019 at 10:39 PM.
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Old 15th January 2019, 05:15 AM   #3180
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Very nice work HernyLarsen! Another happy builder of mini Karlsonators.
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