Hello guys! I have bought Shure SM7B a year ago and as it's really quiet, i've decided to buy a preamp. I've had a little amount of cash so i've bought Presonus Bluetube DP. And from the first using of Presonus i disliked it. It made my signal more noisy then if i record right into my soundcard Native Instruments Komplete Audio 6. Now i've made a little check. I have a vocal cabin, outside of which i've put my Nokia phone and played Nokia Tune Through it and recorded it, so i have a huge amount of noise which i can compare. Then i turned the gain of each other to make the tune sound the same so you can hear the difference of the noise. First part-Mic-Preamp (Gain +40) - Line in (which hasn't a knob to turn the gain) of my NI6. Second Part-Mic-NI6 (Gain +30 i guess) http://dl.dropboxusercontent.com/s/8kwsfnl4pp2wkuz/NI vs Bluetube DP.mp3 I don't know, maybe i'm doing something wrong or NI preamp is really way better then the BT one? P.S. It's the sound from the second channel of BT. The first one is WAAAAY more Dirty then even this!!!