Presonus BlueTube DP V2: 2-channel, dual-path mic/instrument preampA dual personality preamp with an amazing variety of tones. Compact, affordable, and capable of a stunningly wide range of tones, the BlueTube DP V2 dual path mic instrument preamplifier offers two independent channels, each with an XMAX Class A solid state preamp, followed in the signal path by a 12AX7 vacuum tube stage. A Tube Drive control provides a wide range of sounds: When clicked off, you're using the solid state preamp for quiet, transparent