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A Speaker that Kicks Butt in Large Spaces
A Speaker that Kicks Butt in Large Spaces
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Old 19th April 2017, 08:43 PM   #981
freddi is offline freddi  United States
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I cut a 3" hole in the top of that slender "K8" - blocked the horizontal slot port and loaded it with the old stamped frame Nirvana 8. My AN8 pair's parameters changed quite a bit as when that crappy goop used on the surrounds dried, it stiffened the suspension enough to raise Fs by a half octave. One poster says turpentine will soften it again.


Look at this crazy input impedance for AN8 in this cabinet vs the other (unmodified) cabinet with the much different 1772

why might Z be elevated above 15 ohms in the tuning region ?

I like Fostex 206 and 1772 more than AN


Click the image to open in full size.
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Old 5th May 2017, 08:28 AM   #982
freddi is offline freddi  United States
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when making a sub-sat system with reasonably large dynamic range, is a K12 or K10 the most sensible choice? I've run a Delta Pro8A in a little K with pretty good impact. I think a good 10 is about the start of getting "grab" and for regular K. (?)
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Old 10th May 2017, 04:01 PM   #983
hoyungh is offline hoyungh
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thank you freddi for all your sharing. If it werent for you plugging away at k-coupled speakers i probably would have stayed happy with transmission line speakers and ignored how drums never sounded natural on them. Thanks to you and X's models i now enjoy full range speakers that sound natural on drums. They may not have "grab" but changing to 10inch speaker drives would stop them being full range
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Old 10th May 2017, 09:27 PM   #984
xrk971 is offline xrk971  United States
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A Speaker that Kicks Butt in Large Spaces
Quote:
Originally Posted by hoyungh View Post
thank you freddi for all your sharing. If it werent for you plugging away at k-coupled speakers i probably would have stayed happy with transmission line speakers and ignored how drums never sounded natural on them. Thanks to you and X's models i now enjoy full range speakers that sound natural on drums. They may not have "grab" but changing to 10inch speaker drives would stop them being full range
Good to hear that you like the sound of your K's. What is your setup - driver and box size? Photos?
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Old 11th May 2017, 09:30 AM   #985
hoyungh is offline hoyungh
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Thank you X. I have some old 2inch jordans that work strangely well in your models. did i thank you for how you get creative in your models and analysis? the box is 32cm by 22cm by 19cm. if you are on whatsapp i can send pics
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Old 12th May 2017, 06:30 PM   #986
xrk971 is offline xrk971  United States
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A Speaker that Kicks Butt in Large Spaces
2inch Jordan fullrange? That's first I have heard of them being used for a K. I don't have WhatsApp. Please upload and post your jpgs etc here in this thread for ease of accessibility by members.
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Old 12th May 2017, 09:45 PM   #987
hoyungh is offline hoyungh
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I have been a follower of your work. It started as a 0.4 karlsonator which nicely widened the sweet spot for stereo image. Freddi's descriptions of the K reminded me of how live performances of lion dances should sound like. Drum beats should carry a weight instead of the roll we often hear in bass reflex speakers. Of course a 2 inch speaker no matter how much amplifier power we run through it cannot have the heart stopping power of a 10 inch that Freddi's experience says we need.
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Old 13th May 2017, 05:43 AM   #988
freddi is offline freddi  United States
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regarding a 10", I need to investigate a "K10" a bit more by measuring various drivers in the 0.62X K15 cabinet including
Nirvana Supuer10. It has run: Nirvana Super 8, Beta10cx and FE206 so far. It will get a run with Delta10a
to compare to an older "K10" size cabinet.

I'd like to stay near a 2-2.2 cubic foot external bulk for a 10" K-coupler. If too small, then the cavity peak
around 210Hz could dominate

my older "K10" - output wise, there's not a lot given up versus the 115BK 15"| K-coupler

Acoustic's 115BK has a tapered rear chamber which might be a bit smoother in response than Karlson's X15 - I don't know if that
would transfer to a smaller cabinet or not.

I just about bet if 4-Delta10a were put into a cabinet about the size of K15 and driven with
about 1KW peak, that there would be pretty good "hit"

Click the image to open in full size.

K10 Delta10a vs K12 pym1298 (~same as Kappa12a) You can see Eminence's 1.2mH lowpass
inductor isn't sufficient to quell Delta10a's peak before rolloff.
Click the image to open in full size.
K10 Delta10a vs Acoustic Control 115BK EVM15L
Click the image to open in full size.

Last edited by freddi; 13th May 2017 at 05:58 AM.
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Old 18th May 2017, 04:06 PM   #989
freddi is offline freddi  United States
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I'm eying a 10" for either a nice punchy K/X10 or Karlsonator 10

what's the best K that can be done with this speaker? I know it should work fine in a stock Karlson 12


Def_Driver Bass guitar 10 | Eminence 10 Qts=0.23, 3mm xmax, fs=52.22, 97.7dB
SD=366.1cm2
fs=52.22Hz
Mms=25.6g
Qms=2.94
Qes=0.230
Re=4.33ohm
BL=11.99Tm
Le=0.74mH
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Old 18th May 2017, 04:44 PM   #990
xrk971 is offline xrk971  United States
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A Speaker that Kicks Butt in Large Spaces
Quote:
Originally Posted by freddi View Post
I'm eying a 10" for either a nice punchy K/X10 or Karlsonator 10

what's the best K that can be done with this speaker? I know it should work fine in a stock Karlson 12


Def_Driver Bass guitar 10 | Eminence 10 Qts=0.23, 3mm xmax, fs=52.22, 97.7dB
SD=366.1cm2
fs=52.22Hz
Mms=25.6g
Qms=2.94
Qes=0.230
Re=4.33ohm
BL=11.99Tm
Le=0.74mH
Here you go Freddi - 0.67x scale K15 has less extension but is punchier and flatter response.

0.67x Scale K15:

Click the image to open in full size.

0.83x Scale Karlsonator:

Click the image to open in full size.
Attached Images
File Type: png K15-0.67x-Bass10-FR-2.83v.png (13.5 KB, 259 views)
File Type: png K7A-Bass10-FR-2.83v.png (13.8 KB, 255 views)
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