L251 Capsule - anyone use one? Also CK12 options in general.

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johnsonic

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So, I've been hit with the mic with ck12 building bug. I have a matachung with a Beesneez capsule, have an OPR capsule on the way for a beesneez circuit.
I did send @Tim Campbell an email a six weeks back and know he'll respond when he know he can fit me in so not going to bug him. Also have a Dachman capsule in a C12 clone that just clearly isn't in the same league as the Beesneez. The BCK12 sounds fantastic. Have a friend using it right now who is demanding to buy my mic!

The only immediate CK12 style capsule available seems to be Lawson in their L251 (I'd be using it in a 251 clone, so sweet?). I'd love to get a third top quality manufacturer in the mix. SO - anyone put one in a build? Impressions?

Here's my survey of CK12 producers and current situation, if you have other avenues to get them, let us know! Looking for number 3.

MBHO — No capsule sales as confirmed by their US distributor.
Telefunken Elektroakustik — Cannot find where to buy
Beesneez — Excellent, and available
Korby — korbyaudio.com is down. Not sure if they're still in business.
Josephson — No mention of capsule sales. Email is out to them.
Heiserman — Pausing HK12 sales
Lawson — L251 is available for sale
Shannon Rhodes — Looks like he ghosted based on gearslutz posts?
Upton — I think capsules are available? No email, texted and called. Will continue calling.
OPR — Ordered a capsule when available. Now shows as out of stock.
SPA — Looks like he ghosted based on gearslutz posts?
Campbell Transmitter — Email in and will celebrate when I get in the queue.
 

Purplenoise

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The ck12 capsule is a moving target in my opinion because of the so many variations of the originals. I have heard very bright and airy 251s and kinda dark ones that sounded closer to a 47 than a c12.
As far as current production ones I have tried Tim Campbell, beesneez, haun and maiku. The Tim Campbell is the brightest and more “scooped” one with great reach and 3D image. I could never get used to the high end of this capsule…always too bright for my taste. Of course it’s a great capsule and others love it..highly subjective.
The haun is my favorite, darker and more reedy but with enough air and not sibilant at all.
The beesneez sounds very big in the low mids but it sounds a little muffled to me. Very bold sound though.
Maiku is very balanced overall but doesn’t quite have the 3 dimensionality of the previous choices. It’s very nice sounding though and smooth…creamy.
Again all this is subjective and very personal
 

gyraf

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I agree - it's very hard to say anything "in general" about the CK12 in terms of frequency balance. There was a wide variation in the original version as well - which makes it really hard for anyone trying to replicate the response of any one specimen of CK12 - they will always run into people that claim that it sounds nothing like their favorite 251..

I know Tim has solved this by selecting a (original, AKG) reference capsule that most customers agree is a specially good-sounding specimen, then matching every and all capsule built to match this exactly. This has the interesting side effect that if you have a different ideal or some other variation CK12 that you prefer, Tim is able to make an identical twin for it (!!) - providing he has the time for it..

To me, it makes almost no sense to talk about what a CK12 sounds like - I feel that the family trait, the common thing that connects them all, is their ability to take EQ in a non-obtrusive way - that is, you can eq them to sound more or less like each other without messing up their basic sound

/Jakob E.
 

Icantthinkofaname

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Ontario
So, I've been hit with the mic with ck12 building bug. I have a matachung with a Beesneez capsule, have an OPR capsule on the way for a beesneez circuit.
I did send @Tim Campbell an email a six weeks back and know he'll respond when he know he can fit me in so not going to bug him. Also have a Dachman capsule in a C12 clone that just clearly isn't in the same league as the Beesneez. The BCK12 sounds fantastic. Have a friend using it right now who is demanding to buy my mic!

The only immediate CK12 style capsule available seems to be Lawson in their L251 (I'd be using it in a 251 clone, so sweet?). I'd love to get a third top quality manufacturer in the mix. SO - anyone put one in a build? Impressions?

Here's my survey of CK12 producers and current situation, if you have other avenues to get them, let us know! Looking for number 3.

MBHO — No capsule sales as confirmed by their US distributor.
Telefunken Elektroakustik — Cannot find where to buy
Beesneez — Excellent, and available
Korby — korbyaudio.com is down. Not sure if they're still in business.
Josephson — No mention of capsule sales. Email is out to them.
Heiserman — Pausing HK12 sales
Lawson — L251 is available for sale
Shannon Rhodes — Looks like he ghosted based on gearslutz posts?
Upton — I think capsules are available? No email, texted and called. Will continue calling.
OPR — Ordered a capsule when available. Now shows as out of stock.
SPA — Looks like he ghosted based on gearslutz posts?
Campbell Transmitter — Email in and will celebrate when I get in the queue.
I'd probably go with OPR or Beesneez myself because I know they'll tune their CK12 capsules for you. I didn't get a response when I tried asking the other manufacturers of CK12 capsules. Ben at Beesneez is very quick to reply if you email. I'm definitely interested in hearing a sample of the OPR capsule and what you think.
The ck12 capsule is a moving target in my opinion because of the so many variations of the originals. I have heard very bright and airy 251s and kinda dark ones that sounded closer to a 47 than a c12.
As far as current production ones I have tried Tim Campbell, beesneez, haun and maiku. The Tim Campbell is the brightest and more “scooped” one with great reach and 3D image. I could never get used to the high end of this capsule…always too bright for my taste. Of course it’s a great capsule and others love it..highly subjective.
The haun is my favorite, darker and more reedy but with enough air and not sibilant at all.
The beesneez sounds very big in the low mids but it sounds a little muffled to me. Very bold sound though.
Maiku is very balanced overall but doesn’t quite have the 3 dimensionality of the previous choices. It’s very nice sounding though and smooth…creamy.
Again all this is subjective and very personal
Have you tried the OPR capsule?
I agree - it's very hard to say anything "in general" about the CK12 in terms of frequency balance. There was a wide variation in the original version as well - which makes it really hard for anyone trying to replicate the response of any one specimen of CK12 - they will always run into people that claim that it sounds nothing like their favorite 251..

I know Tim has solved this by selecting a (original, AKG) reference capsule that most customers agree is a specially good-sounding specimen, then matching every and all capsule built to match this exactly. This has the interesting side effect that if you have a different ideal or some other variation CK12 that you prefer, Tim is able to make an identical twin for it (!!) - providing he has the time for it..

To me, it makes almost no sense to talk about what a CK12 sounds like - I feel that the family trait, the common thing that connects them all, is their ability to take EQ in a non-obtrusive way - that is, you can eq them to sound more or less like each other without messing up their basic sound

/Jakob E.
Yeah, they measure all over the place and according to AKG when they wrote the marketing material for the C414 TLII which has a capsule that's supposed to be based on the C12 sound, the presence boost should be +6 dB, but then you have mics with the same capsule as the C12 tuned to be darker like +3-4 dB. You also have companies like Austrian Audio that talk about the brass ring CK12 and act like they have an accurate recreation even though they have a ceramic mounted capsule that isn't tuneable. They say they built their capsule "to the same critical dimensions".
 
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johnsonic

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Oct 14, 2021
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PDX, OR
Great feedback! Am wanting to have a ck12 smorgasboard and can't wait until my OPR arrives. I'm asking about the L251 in that it's really spendy, but have not seen anyone post with direct experience with them.

Does anyone have experience with or a test recording of the Lawson L251 capsule?
 

GeorgeToledo

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Mar 3, 2015
Messages
147
Well, the MBHO modular head with CK12 style capsule is still a product. It isn’t “voiced” exactly like a vintage CK12 or the even the CK12 capsules they make for others, but you could always buy the head and use the capsule inside.
 

johnsonic

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Joined
Oct 14, 2021
Messages
55
Location
PDX, OR
I'm definitely interested in hearing a sample of the OPR capsule and what you think.
Me too! It's on the way and am excited to use it. Was actually thinking I might put connectors on the capsule wires for easy change outs. Am super interested in how capsules work with the circuit they're in. Which is why I'd love some input on the L251 capsule.

Once I build the 251 I'll have a C12 and a 251 in a HT-11A body, so would be wicked easy to swap an OPR for the Beesneez. My third mic (C12) is beesneez lower-end DIY body, but would still be helpful in that I wouldn't need to solder.
 
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