hi zman01 - re: K
xrk971 could simulate a cabinet. I think his Karlsonator sims seem pretty good.
Karlsonator 6 plan - it would take a bit of modification making the speaker baffle taller as at 8 inches, its about a 1/4" shy of 12P's 207mm frame diameter. FWIW, I've tried a de-whizzered FE164 in a Karlsonator 6 prototype and thought a decent match.
http://i.imgur.com/xp0P8go.png
my Karlsonator6 prototype has roughly a 60Hz tuning - my Karlsonator12, ~37Hz
It might be worth a sim in the Karlsonator 8 which is tuned to ~42Hz
http://i.imgur.com/tnbO9Yy.png
AmadeusMozart's SK6.5 (directly based on a Carl Neuser 8" design) may work. Carl is a believer in using the curved reflector ("Fig.6") from K's last "Acoustic Transducers" patent.
somewhere there's a larger drawing of SK6.5
https://lh6.googleusercontent.com/-...ABVY/Kn9Ql6AVzrY/w1040-h796-no/HAK6.5.GCF.PNG
comparison of T-S Alpair 12P to FE166EN
https://i.imgur.com/eUzqeuI.jpg
in some cases, I think its subjectively helpful to extend the aperture
to nearly the top - you don't want that too wide.
a curved reflector can be nicely approximated with slats on a
form as with AmadeusMozart's SK6.5 below
xrk971 could simulate a cabinet. I think his Karlsonator sims seem pretty good.
Karlsonator 6 plan - it would take a bit of modification making the speaker baffle taller as at 8 inches, its about a 1/4" shy of 12P's 207mm frame diameter. FWIW, I've tried a de-whizzered FE164 in a Karlsonator 6 prototype and thought a decent match.
http://i.imgur.com/xp0P8go.png
my Karlsonator6 prototype has roughly a 60Hz tuning - my Karlsonator12, ~37Hz
It might be worth a sim in the Karlsonator 8 which is tuned to ~42Hz
http://i.imgur.com/tnbO9Yy.png
AmadeusMozart's SK6.5 (directly based on a Carl Neuser 8" design) may work. Carl is a believer in using the curved reflector ("Fig.6") from K's last "Acoustic Transducers" patent.
somewhere there's a larger drawing of SK6.5
https://lh6.googleusercontent.com/-...ABVY/Kn9Ql6AVzrY/w1040-h796-no/HAK6.5.GCF.PNG
comparison of T-S Alpair 12P to FE166EN
https://i.imgur.com/eUzqeuI.jpg
in some cases, I think its subjectively helpful to extend the aperture
to nearly the top - you don't want that too wide.
a curved reflector can be nicely approximated with slats on a
form as with AmadeusMozart's SK6.5 below
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@zman01 - xrk971 says a 0.67 scale Karlsonator simmed best for 12P. I think that's reasonably close to the Karlsonator6
A Speaker that Kicks Butt in Large Spaces
Full size Karlsonator(12)
https://lh6.googleusercontent.com/-.../AAAAAAAABik/txissf4J4PI/s800/Karlsonator.png
a 2/3 scale Kalrsonator would be about 20.75" T x 12" D x 11.2" W
____________________
Originally Posted by freddi View Post
Question for xrk971. If one is to use Mark Audio's Alpair 12P in a K - Which K suits it best overall? Would it be a Karlsonator? How would it play in GregB's Karlsonator6 which has Fb ~60Hz? Would it be lost in a stock Karlsonator8? What can be done with the original K concept ? How about a well thought out XKi ?
Def_Driver "ALpair12P" | ~6.5 in. Full Range driver from Mark Audio
Sd=147.41cm2
Fs=42.15
Mms=10.217g
Qms=1.981
Qes=0.333
Re=7.000
BL=7.540T-M
Le=0.054mH
Vas=43.060L
Hi Freddi,
I ran this sim a long time ago - yes, a 0.67x scale Karlsonator is best for the A12P. It will get about 93dB sensitivity and F3 of about 48Hz.
X
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A Speaker that Kicks Butt in Large Spaces
Full size Karlsonator(12)
https://lh6.googleusercontent.com/-.../AAAAAAAABik/txissf4J4PI/s800/Karlsonator.png
a 2/3 scale Kalrsonator would be about 20.75" T x 12" D x 11.2" W
____________________
Originally Posted by freddi View Post
Question for xrk971. If one is to use Mark Audio's Alpair 12P in a K - Which K suits it best overall? Would it be a Karlsonator? How would it play in GregB's Karlsonator6 which has Fb ~60Hz? Would it be lost in a stock Karlsonator8? What can be done with the original K concept ? How about a well thought out XKi ?
Def_Driver "ALpair12P" | ~6.5 in. Full Range driver from Mark Audio
Sd=147.41cm2
Fs=42.15
Mms=10.217g
Qms=1.981
Qes=0.333
Re=7.000
BL=7.540T-M
Le=0.054mH
Vas=43.060L
Hi Freddi,
I ran this sim a long time ago - yes, a 0.67x scale Karlsonator is best for the A12P. It will get about 93dB sensitivity and F3 of about 48Hz.
X
__________________
Last edited:
If there's an issue with lack of bass, then the boxes are potentially over-stuffed.
jeff
Can you elaborate a little more? Have you tried other speakers? Do they sound smooth? Have you tried the A12P's in a smaller or different room?
Always off axis. They are placed without any toe-in. I've found a ribbon-tweeter produced by L.Cao specially design for his FA8 8" widebandner which crossed at 15K 3rd order. I will try it first, then, something like Fostex horn-loaded supertweeter.
Haven't. I used A10.2M in smaller room before. I picked A12p in SuperPencil because of new aparament. Powered by only 1.5W SET, but my 300B SET is nearly completed.
I have personally tried the Alpair 10P in Pensil enclosure paired with the Fostex FT17h (as well as the Dayton AMT Mini-8), run in parallel configuration with the full range, with great results (crossed at 10k-13khz).
Although it isn't neccessarily needed, it did add a touch of airy-ness and naturalness escpecially in cymbals and metallic instruments.
Although it isn't neccessarily needed, it did add a touch of airy-ness and naturalness escpecially in cymbals and metallic instruments.
Got great improvement throughout the whole frequency range and imaging if you place it right.
Put it on top as usual. Normally, you will find it very noticeable. Then, move it backward until you hardly feel it. Return to your seat to reconfirm the imaging. Minor adjustment may required. After you feel satisflied, disconnect it and you will hear the big difference. Similiar sensativity is required.
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