The beta 91 is a capacitor for the bass drum. It's really limited as applications. I would say to the bass drum metal, etc.. The earlier opinion gives very good product, no need to repeat the things I think he said.

OVERALL OPINION

It is not versatile, it's the least we can say. I've had six months. I recorded several large boxes with. It was a mistake. I prefer 1000 times the D112. Filtering as is customary in the trash, metal, ska-punk, etc., the D112 has the same result. However, without filtering, the D112 also gives a good result. This is not the case so that the beta91 planed down medium it sounds "too much" typed double pedal. Of course it's a matter of taste. It is subjective. I keep it in case the customers really want. Personally, spontaneously, I surely will use it more. Yet it is not jazz we are used to record the studio horlebaix.