Had been looking for another kick mic to complete my kick sound for a long time. I'd gone through several mics, the D112, D6, Beta 52, E602 and I'd settled for the Beta 52, but I was still lacking a focus. I knew getting another kick mic to compliment the sound would give me a much better sound. My first choice was the Beta 91 but it seemed a bit too clacky. Wasn't very focused for me and seemed to add an undesireable sound that I couldn't EQ out to make it work with the Beta 52.
I love the other Sennheiser mics I have and this seemed like the perfect choice. I've paired this up with a Beta 52 and an E602. I now have an amazing kick sound before I do any EQ. The E901 is very focused, gives me a great punch/slap. It's very mix ready. The connector on the mic is solid unlike the one on the Beta 91. It's just a very good quality piece of kit. I'd recommend this to anyone who's searching for a second (or if you're like me, a third) kick mic to enhance your sound, either in a live or studio setting.