Sorry Freddi for not communicating clearly. For this .205 volume K you will be looking for a full range driver with an optimum vented bass reflex volume of 22 litres. internal volumes are the deciding factor. since you already have the box maybe you can scout for a good driver. good luck and good hunting
thakns - I'll think about some of the stuff I already have - my Nirvana Super8 hav stiffedn moving Qts up to around 0.38 but fs moved to the 60's which moves fs down - gotta check. Do you have any ideas for a "new" K? A "recipe" ?
Freddi you are probably looking for a smaller speaker. for instance one of X's favourite the TC9FD has an optimum bass reflex volume of 15 litres.
I'm looking for the best small K which can play 120+ dB peaks as to compete with larger front loaded horns. I don't think an 8 will do it. I would like a dedcated midrange K with good sensitivity which could handle power and not have obnoxious resonances/dips/peaks
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Freddi out of the speakers you have which sounded best as a full range unit. Maybe we can start from there and hopefully get to where you want to be
Kurvy K with 3FE22
This is a K15 scaled down for a 3.5in Faital Pro 3FE22 (16ohm) driver. The curved front does a nice job of eliminating the front chamber hollowness. I am listening to it now (powered by Pass M2 Class A and my own SE Class A CFP preamp) on some jazz vocals with a stand up bass and have to say that I am surprised how good it sounds. I haven't measured it, and don't plan to, as these are just fun speakers. The 91dB sensitive 3FE22 has a particularly strong Nd magnet motor, so I think that works well with this alignment. The imaging is very nice and tight with a single fullrange.
Base measures 5.5in x 5.5in and whole thing is 9in high - a very compact little K. I know Freddi will love this 😀
This is a K15 scaled down for a 3.5in Faital Pro 3FE22 (16ohm) driver. The curved front does a nice job of eliminating the front chamber hollowness. I am listening to it now (powered by Pass M2 Class A and my own SE Class A CFP preamp) on some jazz vocals with a stand up bass and have to say that I am surprised how good it sounds. I haven't measured it, and don't plan to, as these are just fun speakers. The 91dB sensitive 3FE22 has a particularly strong Nd magnet motor, so I think that works well with this alignment. The imaging is very nice and tight with a single fullrange.
Base measures 5.5in x 5.5in and whole thing is 9in high - a very compact little K. I know Freddi will love this 😀
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brilliant little K - and "TWO TONE" 😀 - it would be interesting to hear how the curved aperture would fair in a larger K. I've never heard 3fe22 but do like 4fe32.
Haha, another project for thejessman... he can use kerfed "bendy" ply for the aperture? Or soak plywood in water overnight the screw down while wet and it will hold its shaped after it dries.
haha - that's where we could use some FEA modeling - whats the board above the baffle look like in your little K ?
Hey X - since K's usually excel on guitars - start around 1:44 in this video to get past the talk
https://www.youtube.com/watch?v=RjjmutHRs44
Hey X - since K's usually excel on guitars - start around 1:44 in this video to get past the talk
https://www.youtube.com/watch?v=RjjmutHRs44
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how does it do on the Siena Pianoforte ? (a wonderful instrument) https://www.youtube.com/watch?v=wadANaPrmjg
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I think it actually sounds pretty good playing back guitar. The attack and dynamic range is quite nice. From listening, I would guess it goes down to about 100Hz.
Here is a recording of the classical/flamenco guitar video you linked.
Change extension from .asc to .mp3 to listen.
Here is a recording of the classical/flamenco guitar video you linked.
Change extension from .asc to .mp3 to listen.
Well done X. I pop off to church on sunday morning and when i come back all this interesting news is here. I should have realised something was up when you commented on the TC9FD 0.4 karlsonator.
that recording of Kurvey-K3 with guitar has good dynamics and tonality - just a bit lacking on the low end
perhaps someone will try Kurvey with larger drivers
perhaps someone will try Kurvey with larger drivers
You mean give details on internal dimensions etc? There is not much to say other than it's a direct scale-down per driver nominal size and I simply reduced the front chamber volume by curving the aperture all the way to where the top board with the vent meets the top panel.
I think it will work well with a larger driver like a 12in coax.
I think it will work well with a larger driver like a 12in coax.
well - you might post it separately with a brief discussion - regarding 12cx version - do you think the 1956K12 style most appropriate ?
would it be kinda like so ? - the way I crudely did this, there isn't a lot of front chamber volume reducitno. I don't know what's "optimum" for some 12CX
would it be kinda like so ? - the way I crudely did this, there isn't a lot of front chamber volume reducitno. I don't know what's "optimum" for some 12CX
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That's basically it but mine started tangent to the vertical from the bottom front. Not a big deal and I have no basis for reducing front chamber volume other than to allow curve to work. Reducing front chamber volume loads the cone more for higher SPL actually. But having a curve on a small full range driver makes a difference.