Micro U47

Hors sujet :

 

J'ai envoyé ça à Flea, on va voir ...

 

I currently interested in buying U47 type of mic.

 

I’m aware that nowadays a real U47 is not available, therefore I’m interested on clone type of mics.

 

I’ve seen the Flea47 you manufacture, but I would need more details about them, especially technical details.

 

There are plenty of clone manufactured … I trust your mechanical design, but I do not have enough information about the electronic design you use to directly buy your microphone.

 

Some please find below my questions :

 

The initial tube is VF 14, you offer EF12 or EF14 on request, right ?

What is difference between both sonically, what tube is the closest to VF 14. Are the tubes pass quality tests before buying the mic ? or do you adapt electronic design depending on tube behavior ?

 

About  the electronic design itself, the U47 use fixed bias, does your mic use fixed bias or self-bias ?

What about power dissipation of the mic itself ? The original mic dissipates 4.2 W, do you still have the same dissipation in your mic (temperature impacts the components operating ..), do you use heat resistor stuck on mic body ?

 

About the power supply :

Do you use the same power supply for EF 12 or EF 14 ?

Do you  use separate voltage line for heater power supply ?

Is it passive power supply as Neumann made in the past, or regulated  (or zener) one ?

 

 

Hors sujet :

 

La réponse de Flea :

 

Yes, we offer mostly EF12 tube, or VF14 (for big additional costs, as there is real lack of these tube in the world)

With EF12 tube we can achieve the closest sound to VF14 version.

 

Here I am attaching info about the tubes possible for Flea 47:

 

Difference between the tubes:

All tubes have almost the same sound character, they differ in heating, and very very very small nuances of their sound. The brightest sound has FLEA 47 with UF14 in comparison to EF14 or EF12, then EF14 in comparison to EF12.
The truth is that with EF12 tube we can achieve the closest character of sound to U47 with VF14.

In our honest opinion and with experiences that we have with these tubes, the sound of all three tubes is very close to VF14.
But EF12 sound is the closest to VF14 because of its softness . When we have recorded male vocal to original TELE U47 and Flea 47 with EF12 result was absolutely the same . Flea 47 with EF14 or UF14 is little bit opened on high end compared to TELE 47 .
But magic things will come out until during mixdown. When we put microphone tracks into the playback and set them on the same level, EF12 and VF14 are identical because of “ smooth compresion ‘’ and tonal character. Our favourite is EF12 as substitution for VF14. 

 

Of course, we adapt electronic design depending on a tube.

Our mics use self-bias. 

 

And the power supplies …. yes, we use separated voltage line for heater

and our power supplies are modern ones. We cannot make power supplies to be copied old originals and they were dangerours,

moreover, EU and world safety rules don’t allow to make this old architecture wirings …

We manufacture power supplies that are tested and certified PSUs for usage all over the world.