Right, that makes sense. I remember seeing a photograph of all the parts inside the Banzai capsule but I can't find that photo now. Based off that other thread you linked to, it seems like how much you tighten the capsule affects the capacitance of the capsule. This is interesting because the capsule forms a charge pump with C2 determining the sensitivity of the microphone. I'm finding these mics to be much louder than my KM86 and I wonder if the capsules are not tightened down properly?I think the trick will be to make the kk84 patent drawings or kk84 measurements be the right diameter for the typical Chinese capsule.
This is an interesting idea. My understanding is that Neumann still makes KK84 capsules for around $550 USD. If we had an adapter for the threads and the pin you'd end up with a pretty reasonably priced KM84.It is more likely that an adapter can be machined to allow the german capsule to thread onto an asian tube—or even re-thread an mxl or oktava body?
Building the capsule is no trivial matter—I know it is in the Diy spirit and a 1 off etc.
I’d buy an adapter if one was available.
I do have these Banzai capsules already.
also, there's no "Banzai KM84". I didn't start this build thread, and we've never called it that.
Guy who's never going to build this kit, sharing opinions! Yay!You are totally correct Banzai,
you never called this project "Banzai KM84".
Here's "one".You called it "Neumann KM84", although there's no one that seem to have been able to achieve a microphone with your kit that sounds even similar to a Neumann KM84.
Adjust C2 to set the sensitivity you want. You can replace it with any value you prefer.I'm finding these mics to be much louder than my KM86 and I wonder if the capsules are not tightened down properly?
Not the same capsules. These don't need taming, but... chopping up metal for science is always a good thingSounds like the usual symptoms I've read about with these capsules. I found this article from a guy who tried this mod you're thinking about, and got good results with taming the HF response. What tool would you use for this, dremmel? I'm interested too, altough I'm still yet to build mine..
Yes, my understanding is that this is a crucial element to the function and design of a KK84… do these capsules not have this?
Only McIrish posting here has built kits from the 4th batch. Others like Corgan and Craigmorris don't have kits from 2021. So we're not going to question the quality of a large batch because of the results of one or two people.It sounds a lot like a bad batch, then, Banzai. Glad you're offering people replacements.
Encouraging people to experiment with their builds and try different parts is not being defensive. There's no strategy here, nor do I want one.But like I said in the other heated discussion on the Maiku LDC capsules, you seriously need to consider your defensive strategy.
Read between the lines: he never built the kits, let alone compare them or build an adapter.You responded with a turd-emoji in response to RuudNLs valid - or at least I think so - demonstration and arguments.
Overtly dickish tone is a better description.And to Whoops, who I think has a point despite the somewhat aggressive tone, has a point, you respond to with sarcasm and mockery. Not the kind of response that gives people confidence in your product.
Bad assumptions. We don't sell anywhere near enough kits to live from this, and as demonstrated above, some of these people are trying to influence opinions.These people are not out to threaten your livelihood (considering you mentioned that you sell hundreds of kits of ~140 euros per batch, I think it's safe to say that it must be a part of it), but ensure fellow DIY'ers aren't duped by false marketing.
No microphone expert would say all that. You're confusing two different things:I know all elements factor into a mic, but from everything I have ever read on pro audio microphones by experts - granted I'm no expert myself - the capsule is THEE most important factor of the sound of the mic. Put a U87 circuit with authentic transformer and all into a Chinese mic with those shitty stock K67-style capsules, it won't sound like a U87. Put a proper U87-style capsule in there, it's a new mic. Whether it's made with a Schoeps-style circuit, KM-84 or U87-style circuit or whatever. Most everyone I've seen agrees with that, including people with substantial knowledge about the inner workings of mics.
Neumann is in the thread title to credit them as the source. We didn't create the KM84 circuit. We can change it to something else, it's not important.I don't doubt from the reputation of the Maiku LDC capsules that the SDC capsules has a high quality/price-ratio, too. But it's like Whoops is saying - you are calling it "Banzai's Neumann KM84 DIY kit"
-NOT simply "Banzai's KM84 DIY kit", "Banzai's Neumann KM84-style microphone DIY KIT" or "Neumann KM-84-inspired DIY kit" or whatever. That sort of naming mentioning the original brand name calls for a very high level of authenticity, which I don't doubt is what you're going for. But it does make you vulnerable to criticism when it doesn't sound right.
Stated the circuit can be used to adjust the frequency response, and each transformer type affects the frequency response of the mic differently. Both statements are true.But you're also muddying the waters by suggesting it's the transformer or FET-types or a cap value causing the deviating frequency response.
No returns. It's a DIY kit.All points to bad capsules in the cases in this thread. Perhaps you should ask the original manufacturer and/or Maiku to up the quality control, if possible, if it hasn't been a problem before. But again, good you're offering returns.
Then you might as well buy from Stam instead of building anything on this site. For most people DIY is about the process. It's about making something yourself. Not everything is about money.Also, for the price of the kit with all parts included - don't get me wrong, I don't think it's expensive by any means compared to say micparts or micandmod - you can almost get a 3U Warbler 127 that are already painted, assembled, properly biased, stereo matched (if you buy a pair) and documented to sound very close to a KM84. I do think that calls for you to have everything in order to be a viable alternative for DIY'ers.
Also, for the price of the kit with all parts included - don't get me wrong, I don't think it's expensive by any means compared to say micparts or micandmod - you can almost get a 3U Warbler 127 that are already painted, assembled, properly biased, stereo matched (if you buy a pair) and documented to sound very close to a KM84. I do think that calls for you to have everything in order to be a viable alternative for DIY'ers.
This. 100%. I'd never recommend someone GroupDIY to save money.Banzai said:Then you might as well buy from Stam instead of building anything on this site. For most people DIY is about the process. It's about making something yourself. Not everything is about money.
What is the problem with the 2n3819's? They're from mouser so supposedly not fake?
At first I didn't think the FET type would make much difference. As a straight amplifier, it should not have much bearing on the sound, but the source resistor is going to have an effect on the overall drive current into the transformer.
If anyone ends up with an oddball zingy capsule, get in touch and we can work out a replacement.
Of course it's possible some people end up with problematic capsules or transformers. Nothing is 100%. The way to resolve those issues is to get in touch with us, like you would with any other product.
No returns. It's a DIY kit.
Are the perforations in the center ring what we see above in the Maiku capsule?I would assume not. I don't think any of the Chinese-made capsules go to that level of detail. They usually have a concentric circle pattern, something like this:
View attachment 84345
Interestingly, the recording hacks page where I got this image mentions that earlier revisions of the MXL603s had perforations in the center ring to get closer to the sound of the Neumann capsule. But in later runs, they stopped doing that.
The article's from 2013 so anything might have changed since then.