Art Tube MP external tube microphone preamp.

Art Tube MP
The Tube MP is the world's most popular external tube microphone preamp. Whether you're working with a digital, computer or analog recording system, the Tube MP's TEC award nominated design will allow you to obtain professional recording studio results at a fraction of the cost of comparable equipment. The hybrid design of the Tube MP allows it to add warmth and fatness to a signal while maintaining exceptionally low-noise and high quality. While its primary application is to be used with a microphone, the Tube MP is an exceptional direct box - impedance matching, amplifying and improving the sound of any instrument plugged into it. The usage of external mic/line preamps has become increasingly popular over the past several years. The Tube MP offers superior performance and sound quality to the "on-board" preamps found in today's low-cost mixers and multi-trackers. It's sound has been consistently favored over other products costing upwards to ten-times its price. Professional quality sound combined with professional features like: a hand-selected 12AX7a tube, phantom power and phase reverse are what have made the Tube MP a staple in thousands of studios worldwide. For a minimal investment, a Tube MP can provide the single largest improvement to the sound of your studio.

Specifications:
•Provides Superior Preamplification for: Microphones, Instruments and Line Level Sources
•Hand Selected 12AX7a Provides 70dB of Gain Smooth, Warm and Fat Sound Quality
•Variable Input and Output Gain Controls
•Excellent as a Tube DI
•XLR and 1/4" Inputs and Outputs +48 volts
•Phantom Power
•Phase Reversal Switch
•Superior Sonic Performance to On-Board Preamps
•TEC-Award Nominated Design
•Portable, All Steel Construction
•CMMR > 75dB (typ @1kHz)
•Dynamic Range > 100dB (20Hz to 20kHz)
•Equivalent Input Noise -129dBu ('A' weighted XLR to XLR)
•Frequency Response 10Hz to 20kHz (+0,-1dB)
•Input Impedance 2k ohms (XLR), 840K ohms (1/4")
•Maximum Gain 70dB (XLR to XLR typical)
•Maximum Input Level +14dBu (XLR), +22dBu (1/4")
•Maximum Output Level +28dBu (XLR), +22dBu (1/4")
•Output Impedance 600 ohms (XLR), 300 ohms (1/4")
•Power Requirements 9 VAC @ 700ma (typ)
•Total Harmonic Distortion <0.1% (typical)