kingkorg

Anyone seen this capsule?
« on: February 17, 2021, 12:13:59 AM »
Has anyone tested this one yet? Just ordered one.

https://a.aliexpress.com/_mNljMSB


RuudNL

Re: Anyone seen this capsule?
« Reply #1 on: February 17, 2021, 03:24:20 AM »
The front looks like a standard 'Chinese' capsule.
But the backside looks interesting.
Please let us know your impressions!
There is a solution for every problem!

http://www.vansteenisaudio.nl

rogs

Re: Anyone seen this capsule?
« Reply #2 on: February 17, 2021, 06:10:03 AM »
There seem to be 4 options - 2 for the 13.5mm and 2 for the 15mm.

Reviews included the  (presumably translated into English?) comment:  "Normal Chinese capsule. Like everyone else, it's a lot too high. The seller packed perfectly, armored. Carton box, inside foam box, plastic box with drip wrapped in many layers of film"

The specs for the 15mm version  include a strange line at point 7:

34mmX15mm parameter:
1: Sensitivity -35 (± 3) dB (at 1 kHz 0 dB = 1 V / Pa)
2: point to the characteristics of heart-shaped (at 1KHz)
3. Frequency response 70Hz-15KHz
4. Maximum sound pressure level 36dB( dB (at 1KHz≤1% T.H.D)
5. Reference working voltage 5V-48V
6:Power Requirement: 48V Phantom Power
7:Circuit board requirements:
Front board can be connected, 48v and 60v polarized boards are not compatible


If the 'polarized boards'  are not compatible, is this version an electret?

Be interesting to read about what actually turns up!

www.amx.jp137.com - A DIY RF condenser mic project

dbelousov

Re: Anyone seen this capsule?
« Reply #3 on: February 17, 2021, 07:35:19 AM »
Reviews included the  (presumably translated into English?) comment:  "Normal Chinese capsule. Like everyone else, it's a lot too high. The seller packed perfectly, armored. Carton box, inside foam box, plastic box with drip wrapped in many layers of film"

It's Russian. "Standard" Chinese quality, highs are boosted as usual. Two Russian buyers claim that it has HF boost and another one claims he doesn't hear any.
Dmitry

kingkorg

Re: Anyone seen this capsule?
« Reply #4 on: February 17, 2021, 10:38:07 AM »
Thanks Dmitry!

Recording Engineer

Re: Anyone seen this capsule?
« Reply #5 on: February 20, 2021, 06:20:49 PM »
Yes the picture intrigues me, but it’ll be interesting to see what shows and what it actually is.

From the picture, it doesn’t seem like anything I’ve seen anywhere.

Whoops

Re: Anyone seen this capsule?
« Reply #6 on: February 21, 2021, 12:01:48 AM »
From the picture, it doesn’t seem like anything I’ve seen anywhere.

The 34x13.5 model seems like a normal K67 type Chinese capsule,
but the 34x15 model it's quite strange, it might be an Electret, what do you guys think?

kingkorg

Re: Anyone seen this capsule?
« Reply #7 on: March 22, 2021, 03:54:46 PM »
It has arrived.  Sadly measures and sounds disappointing. Peaks about 5db at 4-5khz, and rolls off significantly already at 8K. Sounds very lo-fi, and has a peak where you need it the least. Kick in mic maybe?

It's an electret. Nothing wrong with that inherently.

I still have some hopes, it can be easily modified, similar design to AKG large capsules. So backplate chamber volume, and holes can be easily tinkered with. 

I like how it looks with front disk removed. Btw removing the disk doesn't change the response.







« Last Edit: March 22, 2021, 05:39:15 PM by kingkorg »

kingkorg

Re: Anyone seen this capsule?
« Reply #8 on: March 23, 2021, 01:08:55 PM »
Ok, here's an update. The backplates are separated with 3 of these paper spacers. By removing 1 of these high end bump  gets reduced, and you get the modded response seen in the graph below.

It sounds really nice. Very warm, ribbon vibe. I can most certainly use it now, somewhere where 8K and above isn't needed. Guitar cabs, vibey vocals...




Green response is the modded one.

« Last Edit: March 23, 2021, 01:50:09 PM by kingkorg »

gyraf

Re: Anyone seen this capsule?
« Reply #9 on: March 25, 2021, 10:30:51 AM »
nice.. for reference., what is your Y-axis in above response?
..note to self: don't let Harman run your company..


kingkorg

Re: Anyone seen this capsule?
« Reply #10 on: March 25, 2021, 10:36:27 AM »
Not sure what you mean. Red one is  stock, green one is with one spacer removed.

My reference mics for measurements are calibrated Beyerdynamic MM1 and Line Audio CM4.

gyraf

Re: Anyone seen this capsule?
« Reply #11 on: March 25, 2021, 01:05:51 PM »
I mean amount of dB/division..
..note to self: don't let Harman run your company..

kingkorg

Re: Anyone seen this capsule?
« Reply #12 on: March 25, 2021, 01:16:59 PM »
5db per division.

gyraf

Re: Anyone seen this capsule?
« Reply #13 on: March 26, 2021, 05:49:33 AM »
Nice, the green, then

Any explanation what goes on with red/original below 50Hz?

/Jakob E.
..note to self: don't let Harman run your company..

kingkorg

Re: Anyone seen this capsule?
« Reply #14 on: March 26, 2021, 09:28:32 AM »
It's just the cut off point artefact, sometimes that happens in REW, not sure why. Anyway it's the software, not the capsule it self.

12afael

Re: Anyone seen this capsule?
« Reply #15 on: March 26, 2021, 09:47:07 AM »
can I ask how is your setup for measuring them? i was seeing this video today https://www.youtube.com/watch?v=xRJle8L-GQ8 they have one on how measure speakers without an anechoic room.
heavy metal is the law!!!

kingkorg

Re: Anyone seen this capsule? New
« Reply #16 on: March 26, 2021, 09:56:08 AM »
You don't really need an anechoic room. I do it in a dead vocal booth and i use a flat calibrated cardioid mic as a reference mic. No point in using an omni mic as a reference for measuring a cardioid. I double check sometimes with an omni.

 A lot of companies use small booths or chambers. Neumann uses also a small one for production run quality check. Large ones are used mostly for developing.

I am not really interested in what's going on  below 500hz, condensers are mostly linear there unless the circuit isn't.

I use mostly 10ms iR window ;)

Next best thing if you don't have anechoic chamber is free. You do it outside ;)

If i am especially interested in the capsule measurement i don't use any headbasket, and i use a custom made body that doesn't affect the sound. The capsule is basically floating in the air free of all disturbances. I make sure there is no EMI, and if there is a tiny amount it's visible only at 50hz. 
« Last Edit: March 26, 2021, 10:37:02 AM by kingkorg »


 

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