Precision control is yours with the Presonus Acousti-Q Tube Preamp/Blender Bundle featuring 2 dual-servo microphone preamps with separate gain controls for input; a phase switch; a 12V phantom power supply to accommodate miniature, internal condenser microphones; a variable notch filter and sweepable mid-band EQ; as well as low- and high-shelving EQ controls. The master output section lets you set 2 separate volumes, one for normal volume and the other a boost for solos. Great for guitar, bass, woodwinds . . . virtually any acoustic instrument.