Anyone tried ZOOM SGV-6?

[kingkorg]

I found one of these for cheap in a local ad. Very interesting mic. Uses 3 capsule array to form tight pattern. Limited specs on this one. I expect some heavy notches in the high end, but who knows. Zoom uses some very good Primo capsules in their higher end recorders, so fingers crossed.

 

[k brown]

Usable with the V6 or V3 processor?

 

[kingkorg]

Yeah, but xlr output, so i guess it could be used like a regular mic.

 

[k brown]

Mysterious ! . .

 

[kingkorg]

Now this is a really funky mic. It does work with a regular phantom, but i don't believe it's meant to be used this way. It performs terribly. I'm not buying Zoom V6 just to test it, so the mistery remains.

Each capsule has some filtering going on i guess to cancel different frequencies.

Quality of the build is exceptional!

The capsules are Primo EM414, but i can't find anything on them.

 

[k brown]

Bit off-topic: while digging around, this looks like replacement for EM200:

https://www.primo.com.sg/wp-content/uploads/2022/04/EM415N.pdfhttps://www.primo.com.sg/components/
Three-wire, and complete internal RF-blocking caps! Hope Micbooster stocks them soon; depends on how much EM200 stock they still have, I suppose.

 

[Khron]

I don't suppose there's any sort of microcontroller on the back of the pcb? Just wondering, if it's V6-specific, is there any sort of digital comms along the XLR lines, and/or some sort of multiplexing of the signals from the three capsules that the V6 would then process separately and recombine...

Those chips are "just" some 5v dual opamps (NJM2737 and OPA2314).

 

[k brown]

Possible the 414s are 411s that are customized for Zoom in some way?

https://www.primo.com.sg/wp-content/uploads/2022/03/73BEA9D4.pdf

 

[kingkorg]

Bit off-topic: while digging around, this looks like replacement for EM200:

https://www.primo.com.sg/wp-content/uploads/2022/04/EM415N.pdfhttps://www.primo.com.sg/components/
Three-wire, and complete internal RF-blocking caps! Hope Micbooster stocks them soon; depends on how much EM200 stock they still have, I suppose.

Bravo!

I don't suppose there's any sort of microcontroller on the back of the pcb? Just wondering, if it's V6-specific, is there any sort of digital comms along the XLR lines, and/or some sort of multiplexing of the signals from the three capsules that the V6 would then process separately and recombine...

Those chips are "just" some 5v dual opamps (NJM2737 and OPA2314).

Nope, just caps. V6 supplies regular 48v phantom, and can also be used with any mic. Could be that the mic is just crap. Nice idea, but not really working.


On the other hand, all of these Primo capsules just seem to be gold. Here's a very rough measurement of one of these em414. Fantastic low end for dimensions. FR reminiscent of K67, but 180° seems much better in midrange. According to specs of other 4xx series capsules and Zoom specs they seem to take 140db of spl. Which gives me idea to use them as gooseneck tom mics. Small, good rear rejection, high spl. The measurement is just of a capsule itself. Once put in a end adress body that 10K 180° peak should disappear.

 

[k brown]

Primo got sump'n goin' on!

 

[mhelin]

It might be a combination of first-order and second-order sections where those are mixed frequency dependently - higher frequencies come only from the first elements. There are many variations of the theme "high directional microphones", not sure what this is using.

 

[capacitorless]

Bit off-topic: while digging around, this looks like replacement for EM200:

https://www.primo.com.sg/wp-content/uploads/2022/04/EM415N.pdfhttps://www.primo.com.sg/components/

Great news! I have a M/S mic project underway using EM200s and will get a few of the 415Ns to compare. MicBooster just sent me a tracking number for the 200s, btw.

 

[k brown]

I don't know of anyone retailing the 415N.

 

[kingkorg]

Injection test of the circuit response.
Blue is front, red is middle, green is bottom capsule.

The middle one is 16mm away from the front capsule, the bottom one is 34mm away from the middle one, and 50mm from the front one.

 

[mhelin]

How are those summed, any inversion in phase? Anyway, it seems that at lower frequencies there's longer effective delay which makes sense.

 

[kingkorg]

How are those summed, any inversion in phase? Anyway, it seems that at lower frequencies there's longer effective delay which makes sense.

Both middle and bottom capsules are flipped in polarity in respect to the front one. Which confuses me especially regarding the bottom one which is responsible for the low end. The mic has terrible low end response and it's not surprising. The bottom capsule effectively cancel this range being out of phase. The mic has great off axis rejection, but 0° is basically useless. So what's the point?

 

[Icantthinkofaname]

So what makes it bad at 0°? I haven't heard a sample of it yet, and I believe Sanken also uses three capsules for their CS3e in order to achieve good off axis rejection.

 

[kingkorg]

It has literally no low end below 500hz, like hard cut, not even a trace of it.

 

[Icantthinkofaname]

Bit off-topic: while digging around, this looks like replacement for EM200:

https://www.primo.com.sg/wp-content/uploads/2022/04/EM415N.pdfhttps://www.primo.com.sg/components/
Three-wire, and complete internal RF-blocking caps! Hope Micbooster stocks them soon; depends on how much EM200 stock they still have, I suppose.

I wouldn't mind getting some of those if Micbooster or another company sells them soon.

 

[Icantthinkofaname]

It has literally no low end below 500hz, like hard cut, not even a trace of it.

Ah, I was trying to figure out what was wrong from the graphs. I just re-read your post where you said the capsules being reversed phase cancels out the good low end of the capsules.