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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 September 2019, 02:15 AM   #3431
moray james is offline moray james  Canada
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Quote:
Originally Posted by xrk971 View Post
More here:
Basotect for damping BR-cabinet?!

Use melamine foam. Same as Magic eraser cleaning pads. 100 from China for $7.
Thanks a lot.
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Old 8th September 2019, 02:32 AM   #3432
soundaddict is offline soundaddict  Canada
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Originally Posted by xrk971 View Post
A small dome tweeter above aperture vertex for a cyclops look works too.

Click the image to open in full size.
I really appreciate it, thank you
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Old 8th September 2019, 03:18 AM   #3433
freddi is offline freddi  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
song for your k'nators YouTube
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Old 8th September 2019, 05:39 AM   #3434
daturat100r is offline daturat100r  New Zealand
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Made a start on a pair 0.4 Karlsonators,drew up scale drawing a few weeks ago and cut out inner workings from leftover scraps of Meranti marine ply .Raided wood rack and found some 12" wide 3/8" dressed Kauri sarking that came out of a 100+ year old villa when i cut a hole for a window ,machined it up perhaps 15 years ago so at least its well seasoned.Good use for it cutting thru nail lines so only odd scrim tack hole will show.
Cut sides rough to length and marked out the inner rebates so baffles set a few mm into each side still deciding whether or not to make them "corner" cabinets,will do rebating then decide
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Last edited by daturat100r; 8th September 2019 at 05:58 AM.
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Old 10th September 2019, 02:35 AM   #3435
soundaddict is offline soundaddict  Canada
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I bought other 2 Radio shack 40-1197 drivers, so now I have 4 in total.Does anyone know if I can put 2 of them in parallel in 0.53X Karlsonator, would that work, please?
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Old 12th September 2019, 02:25 AM   #3436
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
If you use the search function in this thread and type “1197”, you will get lots of hits. But here is the 1197 Karlsonator build and test and measurements.

Mini Karlsonator (0.53X) with Dual TC9FD's

Sims and plans here:
https://www.diyaudio.com/forums/atta...-freq-0.5m.png

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Last edited by xrk971; 12th September 2019 at 02:28 AM.
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Old 12th September 2019, 01:56 PM   #3437
soundaddict is offline soundaddict  Canada
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Thank you, it was this post that made me buy my first two 40-1197.Looks like one in 0.4/0.53 box can replace a CHN-70 which is a 4" too, good hint for a noob like me.At the same time I did not find any info on dual 40-1197 in the same enclosure.I do not know if 40-1197 is too big for its size and specs to put two of them in a 0.53x box. It is bigger than TC9 FD and specs differ
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Old 12th September 2019, 04:32 PM   #3438
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
It will require a bigger box than 0.53x. Basically, the volume will have to double. Would require a simulation which I can't do at the moment.

The design for the 1197 (or FE103) is 0.44x in height and depth and 0.55x in width.

Basic (within 1/4in) original 1.0x Karlsonator inside dimensions are:
29.5H x 15W x 16D. Scaled by 0.44x in H and D gets: 13H x 7D x 8.25W.

In order to fit two of them in a dual, need to add about 4 in height to make room for angled bezel.

So H is 17in, let's make W same at 8.25in, now calc D to get double volume of 1st.

V1=13x7x8.25=751 cu in.

V2=17xDx8.25=1500cu in, solve for D.
D=10.6in

So scaling is H is 0.58x, W is 0.55x, D is 0.66x. Kind of a tall and skinny box. This is all done assuming box scales with doubling volume and making baffle big enough for drivers.

You could play with reduced depth and wider baffle for a more "normal" look. Try 0.60x for all dimensions.

D=9.5in x W=9in x H=17.7in is 1513cu in.

So looks like a 0.60x scaled Karlsonator should look like a normal Karlsonator and be able to play two 1197's well.
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Last edited by xrk971; 12th September 2019 at 04:38 PM.
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Old 12th September 2019, 10:36 PM   #3439
soundaddict is offline soundaddict  Canada
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Quote:
Originally Posted by xrk971 View Post
It will require a bigger box than 0.53x. Basically, the volume will have to double. Would require a simulation which I can't do at the moment.

The design for the 1197 (or FE103) is 0.44x in height and depth and 0.55x in width.

Basic (within 1/4in) original 1.0x Karlsonator inside dimensions are:
29.5H x 15W x 16D. Scaled by 0.44x in H and D gets: 13H x 7D x 8.25W.

In order to fit two of them in a dual, need to add about 4 in height to make room for angled bezel.

So H is 17in, let's make W same at 8.25in, now calc D to get double volume of 1st.

V1=13x7x8.25=751 cu in.

V2=17xDx8.25=1500cu in, solve for D.
D=10.6in

So scaling is H is 0.58x, W is 0.55x, D is 0.66x. Kind of a tall and skinny box. This is all done assuming box scales with doubling volume and making baffle big enough for drivers.


You could play with reduced depth and wider baffle for a more "normal" look. Try 0.60x for all dimensions.

D=9.5in x W=9in x H=17.7in is 1513cu in.

So looks like a 0.60x scaled Karlsonator should look like a normal Karlsonator and be able to play two 1197's well.
I wouldn't mind cutting the width to 6 inches...that will require a H=26.55" keeping the same depth.I know it changes the ratio between sides, though.Is it too stupid to build it like that?

Last edited by soundaddict; 12th September 2019 at 10:50 PM. Reason: calculation error
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Old 13th September 2019, 12:03 PM   #3440
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
A narrower front can work. Be careful the aperture doesn’t constrict the driver cone too much or the highs may be reduced. 26in tall is kind of too tall IMO, but that may actually give you deeper bass since TL length is substantially longer. Don’t know until I simulate it.
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