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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 13th September 2019, 04:31 PM   #3441
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
I ran the simulations, and my back of the envelope scaling relations worked. A 0.60x scale Karlsonator will give super high sensitivity of circa 94dB at 2.83v but modest bass extension around 57Hz (-3dB point). a 0.90x H & D and 0.40x W scaled Karlsonator (6in wide x 27.6in high) will give deep 36Hz (-3dB) bass extension but about 88dB sensitivity - and will require a BSC to attenuate the highs to balance the lower bass sensitivity. Not sure how good it will be for deep bass as cone mvovement is limited.

Mini Karlsonator (0.53X) with Dual TC9FD's-karlsonator-fe103e-dual-0-60x-scale-freq-png

Mini Karlsonator (0.53X) with Dual TC9FD's-karlsonator-fe103e-dual-0-90hdx0-40w-freq-png

Perhaps a 0.75x and adjusted width to get 1500 cu in box might be a better tradeoff of bass extension and sensitivity? Although 57Hz -3dB gets the kick drums just right and will work for 95% of music to sound rich and full.
Attached Images
File Type: png Karlsonator-FE103E-Dual-0.60x-scale-Freq.png (17.7 KB, 783 views)
File Type: png Karlsonator-FE103E-Dual-0.90HDx0.40W-Freq.png (19.6 KB, 775 views)
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Last edited by xrk971; 13th September 2019 at 04:36 PM.
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Old 14th September 2019, 02:23 AM   #3442
soundaddict is offline soundaddict  Canada
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Quote:
Originally Posted by xrk971 View Post
I ran the simulations, and my back of the envelope scaling relations worked. A 0.60x scale Karlsonator will give super high sensitivity of circa 94dB at 2.83v but modest bass extension around 57Hz (-3dB point). a 0.90x H & D and 0.40x W scaled Karlsonator (6in wide x 27.6in high) will give deep 36Hz (-3dB) bass extension but about 88dB sensitivity - and will require a BSC to attenuate the highs to balance the lower bass sensitivity. Not sure how good it will be for deep bass as cone mvovement is limited.

Click the image to open in full size.

Click the image to open in full size.

Perhaps a 0.75x and adjusted width to get 1500 cu in box might be a better tradeoff of bass extension and sensitivity? Although 57Hz -3dB gets the kick drums just right and will work for 95% of music to sound rich and full.

Holy mother of speakers...that 94db of 0.60x Karlsonator is simply amazing.I think it is the best choice to make.Losing SPL for a weak low bass seems like a lost cause. That 36HZ bass doesn't look too promising and it comes with only 88db, wasted loudness. 57hz bass at -3db looks nice, if not I could compensate with a subwoofer.I think the 0.60X choice is the way to go even if the boxes will be big.The best trade-off.I can have loud mids with good bass. Thank you very much for playing with both scenarios, I really appreciate it.Once again , the Karlsonator is a great design.
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Old 19th September 2019, 01:14 PM   #3443
Mas Penk is offline Mas Penk  Indonesia
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My Build using Faital Pro

Build 1.jpg - Google Drive

Build2.jpg - Google Drive
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Last edited by Mas Penk; 19th September 2019 at 01:19 PM.
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Old 19th September 2019, 02:31 PM   #3444
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Very nice looking build Mas Penk! Good luck on getting it all buttoned up and playing music!

Let us know how it works out when you finish.
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Old 19th September 2019, 02:33 PM   #3445
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
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Holy mother of speakers...that 94db of 0.60x Karlsonator is simply amazing.
Yes, this is sort of getting into Lowther and other high end, high sensitivity full range driver terrritory, but without the "shout".
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Old 24th September 2019, 12:56 AM   #3446
Bayou Self is offline Bayou Self  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
I just finished my first-ever DIY speaker--a 0.53 Karlsonator in foam board, with a Dayton PA130-8 driver. The sound is a bit like coming from a tin can. There is bass, but not much treble. I used a few handfuls from the inside of a pillow to stuff it like the photos. Did I mess up, or do I need to give it time?
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Old 24th September 2019, 08:57 PM   #3447
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
The PA130-8 is a known good sounding driver in this speaker. It may not have dazzling highs above 12kHz, but that's not what would make it sound like music from a tin can. If you remove the Karlson aperture, does it sound better? If that's the case, maybe slowly enlarge the aperture cutout. Some photos would be helpful to help debug.
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Old 24th September 2019, 10:21 PM   #3448
Bayou Self is offline Bayou Self  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Going to do a rebuild, and fix some mistakes made first time around. Will take photos.
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Old 25th September 2019, 08:53 AM   #3449
twocents is offline twocents  South Africa
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Mini Karlsonator (0.53X) with Dual TC9FD's
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Going to do a rebuild, and fix some mistakes made first time around. Will take photos.
Another thing - make sure that all joins are air tight.
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Old 25th September 2019, 12:01 PM   #3450
Flumphy is offline Flumphy  Romania
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@xrk971 Do you have an idea if the Dayton CE65W-8 could be used as driver? It's small, but with a separate sub maybe? I'm curious as it's a very cheap driver (€6,45).
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