you need to insert it into the post or else it breaks
Soliloqueen's k87(k67) and k47 capsules
- Thread starter kingkorg
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Help Support GroupDIY Audio Forum:
ComplicationFetish
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- Oct 6, 2017
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Sorry for that! It should be fixed now.
elskardio
Well-known member
Hi Ari,
any update on the K47 capsule?
any update on the K47 capsule?
Which one
I am interested also. I am going to need two!
elskardio
Well-known member
The "Accurate" K47 capsule
I am building two different u47's and would like to have a traditional K47.
Excellent!
elskardio
Well-known member
Yes. They'll be binned in 3 bins like Neumann capsules, since side to side matching K47s built like this is kind of hard. $149 for u47fet, 199 for k47 and 249 for k49. The process for these is a bit more involved than the other capsules. The flat K47 is very budget-minded with a lot of part reuse, but the real K47 capsule is a genuine attempt at making a premium capsule, so it's a bit more expensive. They might also be split into bright and dark variants in QC until we can get our backplate tolerances tighter. The tolerances are already much tighter than vintage Neumann capsules, but looser than I'd like. I'm guessing most people will be buying K47s or U47fet capsules.
Do you already know the price?
elskardio
Well-known member
Thanks
So the K49 will have the best side to side matching of all 3?
Does the frequency curve differ from one variant to the other?
no difference in FR between the variants, it's just binning based on side matching.
Selection parameters:
U47fet has a difference >=1dB at 1k,
K47 has an FR difference >=0.3dB <=1dB somewhere but no overall sensitivity difference,
K49 has no difference (Like, less than 0.3dB) in either FR or sensitivity.
So
K49:
K47:
47fet:
There is also some variance at 5k between units, due to the backplate. This variance is considerably smaller than older Neumann K47s, but the units still require stereo matching. I also tweaked the capsule tolerances to bias the 5k bump further towards flat, so that none of them get more than 1dB hotter than the reference Neumann there. So the 5k bump on these is between 1 and 3dB, compared to between 1 and 5 on vintage units. That way you know you're never getting one that's super honky like a really bad vintage k47 or one of those honky wgt capsules.
Here are the outer limits at 5K:
Keep in mind that these are outer limits. The real distribution of responses is on a bell curve with the center appx 0.7dB below the neumann sample.
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soapfoot
Well-known member
Love love love this
Look forward to buying a 47FET cap as soon as they’re available
Really smart how you’ve sorted them by target application, IMO
Will the FET and U47 capsules have a preferred side marked or indicated? (e.g. which is closer to the reference capsule, or otherwise recommended as “front”)
Look forward to buying a 47FET cap as soon as they’re available
Really smart how you’ve sorted them by target application, IMO
Will the FET and U47 capsules have a preferred side marked or indicated? (e.g. which is closer to the reference capsule, or otherwise recommended as “front”)
Our current system actually bins these automatically, just implemented this properly (had to make some changes to the open-source original). If it's not good enough for figure 8, it throws a quiet exception in the viewing panel:
Then sorting K47 vs U47Fet is as simple as looking at the difference at 1K provided the exception is thrown. Quick 2-step selection.
Every OEM client will get their own portal and pool of capsules, too, where they can load and compare units to each other and the reference, easily find stereo matches among their current inventory (soon, automatically, using a relational search based on the same system as the auto binning) etc
yes
With this batch I'm going back to shipping everything myself. I think most people would prefer a steady stream of shipments than this long wait/all at once nonsense. New carrier list:
I kind of shot myself in the foot trying to do external fulfillment when I'd already registered my business in Europe. Now, I can do IOSS shipment to the EU again. Though, this only really counts for orders of 1 Flat K47, due to the value limit. DDP shipping to the UK and Australia are new.
Fedex won't contract with me, too few recent shipments. It's available but ridiculously expensive. You can also order bill to recipient fedex.
I kind of shot myself in the foot trying to do external fulfillment when I'd already registered my business in Europe. Now, I can do IOSS shipment to the EU again. Though, this only really counts for orders of 1 Flat K47, due to the value limit. DDP shipping to the UK and Australia are new.
Fedex won't contract with me, too few recent shipments. It's available but ridiculously expensive. You can also order bill to recipient fedex.
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Sounds good!
Any idea when the K87s are ready to ship?
Thanks
Any idea when the K87s are ready to ship?
Thanks
That's still very reasonable. I think I need to get poctop's D49c pcb set soon.
Still running into high diaphragm tension here, even with jigs adjusted. It's causing bass rolloff which is why k87s are currently only shipping to customers that need them urgently (still true, email me if you need one). Debugging the skinning procedure with Dave Wheeler IRL today in fact.
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