I am selling my PreSonus BlueTube Dual Path Mic pre. It is used but works perfectly and is in great condition. Comes with the power adapter as shown. Here are some specs from PreSonus: The PreSonus BlueTube DP Stereo Preamp is among the most versatile two-channel mic and instrument preamps in its class. Its Dual Path technology lets you choose between two preamp stages: a transparent solid-state or warm tube preamp. Each gain stage of the BlueTube DP is pure Class A with high headroom.

Each channel of the BlueTube DP includes a -20dB pad, polarity reverse, 80Hz filter, and +48v phantom power. On the front panel you'll find controls for solid state gain and switchable on/off tube drive. When the tube drive is off, the tube preamplifier stage is bypassed delivering ultra-quiet and transparent solid state preamplification.

Large analog VU meters provide precise visual monitoring. Dual Neutrik combo jacks for microphones or instruments provides quality I/O and make the BlueTube DP great as a DI for electric bass and guitar. PreSonus BlueTube DP Stereo Dual Path Microphone/Instrument Preamp With 12AX7 Tube Specifications: • Input • Connector Type: Neutrik combo • XLR Impedance: 1.3K Ohms • Hi-Z, 1/4": 1 Meg Ohms
 • Output • Connector Type: XLR and 1/4" TS • Impedance: 51 Ohms
 • Panel Controls • Gain: 0dB to +54dB • Tube Drive: 0% to 100% • Phase Reversal • -20dB Pad • Phantom Power
 • Meters • Analog VU: -2odBu to +6dBu • Clip Indicator: +22dBu
 • Performance • THD Noise (unweighted) solid state: < 0.005% • THD Noise (unweighted) tube stage: 0.01% to 30% • Signal To Noise: >95dB • Power Supply Rejection: >98dB 
 • Physical • Weight: 4 lbs. • Dimensions: 8"W x 1.75"H x 5"D • Mounting: Universal rack tray insert
 • Power Supply • Type: Linear • Input: 16VAC / 1000mA • Power: 16 Watts • Transformer: External PreSonus BlueTube DP Stereo Dual Path Microphone/Instrument Preamp With 12AX7 Tube Features: • Stereo microphone/instrument preamp • Dual Class A gain stages • Tube drive from 12AX7 tube • Neutrik XLR and 1/4" High-Z combo input connectors • Neutrik balanced XLR/TS 1/4" outputs • 20dB pad, polarity reversal, and 80Hz filter on each channel • 2 illuminated analog VU meters I accept paypal only and ship in USA. No P.O. Boxes. Please ask any questions before bidding, thanks!