OK, that?s time to reveal some things. I had this idea quite for awhile, but because I was still experimenting, I did not want to post it--this mic is a double ribbon, in which the rear one is right behind the front. Since it involves acoustical resistance, time delay, phase shift, mass of the air trapped between ribbons, etc., distance between ribbons is very critical. Experimentally, I found the ?optimal? one, with good balance between top range (which is more extended, compare to single ribbon with the same baffle size) and bottom (which goes away with even slight (about 0.2 mm) distance increase between ribbons). That's what you've heard in the samples in another thread. Proximity effect is noticeably lower than single ribbon.
An interesting thing?I discovered that when both ribbons are not tuned exactly ?in unison? there are kinds of vibrations (like two same strings in piano, or guitar, when slightly off), which noticeably affect the sound in low mids. It is extremely hard to tune both of ribbons to exactly the same frequency. Unlike single ribbon, even slightly higher tuning resonance results in bass loss. This effect is much less noticeable, when the rear ribbon is ?way off,? but then obviously, the rear side sounds very different, but it does not noticeably affects the front one.
Yes, this mic probably sounds nice, but for now I put it away for some time to see if something comes on me?.
If you guys have any suggestions?as always, welcome.
Oh yeah, a new mic is coming soon.
