I have read the raving reviews about this mic, so I expected to be blown away, but the reality is even more shocking in a positive way. These microphones are little gems, truly brilliant. The russians know their business. Build quality is excellent, they are very small, the little wooden box is giving some style too.
The sound is unbelievable. I have tested it with a jumbo body guitar, which is a replica of the famous Gibson J200, by Sigma. This is not a bright sounding guitar, more on the darker side, with a lot of bass, and body. When I read the reviews about this mic, and some mentioned this is also a darker sounding mic, I was worried a bit, as I thought my guitar will sound a bit dull with them. I was wrong. The highs are like silk, very precise and detailed, the bass response is killer, and the mids are very stable and punchy. No harshness here. Just pure, classy, great, lively sound. You have to be careful with positioning, though, to avoid boominess, don't position the mic straight to the soundhole. I reached the sweet spot with positioning one mic to the 12th fret, the other a bit higher than the soundhole, and taken a bit futher from the body aiming downwards. The result was just like a very professional, album ready studio quality...in my living room. Oktava is the real deal!