T.bone mic technical data

[Tubetec]

I found this site ,
https://www.tbone-mics.com/en/mikrofone/
It has frequency plots for each mic done with Arta
I was looking at the Retro tube II as a candidate for surgery , it looks like the designers put a huge peak in the top end to try and out compete the next guy in the race for more and more sibilance .

 

[kingkorg]

I wouldn't consider these as reliable. The graph is smoothed with 1/6 and still has tons of ripple.

However it does show some things typical of these mics/capsules.

The mic is not that bright, the graph is 10db per division. The issue is "wrong type" of brightness and the shape.

The dip before the hf rise is an issue, and can't be fixed unless you change the capsule. That dip before boost is creating sense of exaggerated brightness and it sounds brighter than it really is. It's also bright in a wrong way, because it rises up above 10k.

And there is that lack of low end, again typical for those capsules which doesn't help with the sense of brightness.

A good mic would actually measure exactly opposite of this, flip the x axis response and you get something that sounds good.

No one really designed this thing, it just came out this way.

 

[kingkorg]

One more thing, at the point where the dip is largest there is a huge peak in 180° response that touches or sometimes even goes above 0° response. YIKES!