I purchased this pre-amp about a year ago and have used it in the studio only a handful of times. It is quite honestly just a little too noisy for my taste so I upgraded. Unit is practically brand new. Cosmetically and functionally flawless. Included are the user manual and A/C power supply. Comes from a smoke free studio.

Below is a brief review and the unit's specs:
The Tube MP Studio V3 features ART's Variable Valve Voicing Technology - with optimized reference points to begin the recording process. The V3's presets were created & fine-tuned by top studio and live-sound engineers, along with ART's veteran engineering department.

V3 allows you to select between a multitude of preamp settings designed for electric and acoustic guitars, keyboards, bass guitars, drums, vocals and more. V3 gives you incredible presets for every instrument you record, so all your recordings will sound professional. Need to tweak the presets? Go right ahead -- hone your perfect tone! That's the power of ART V3.

It also incorporates ART's OPL™ (Output Protection Limiter), which precisely and accurately controls and maintains the output peak signal. The OPL circuitry is crucial in protecting the next link in a signal chain - such as a hard-disk recording system or a sound card.

The Tube MP Studio V3 can also function as a direct box - impedance matching, amplifying and improving the sound of any instrument.

The design of the Tube MP Studio V3 allows it to add warmth and fatness to a signal while maintaining low-noise. Features include Phase Reverse, +48v phantom power, clip LED, a +20dB switch, as well as an analog VU meter for visual tracking of the signal. 1-year warranty.

ART Tube MP Studio V3 Features

• Provides superior preamplification for:
  • Microphones
  • Instruments
  • Line Level Sources
• V3™ - Variable Valve Voicing
• OPL™ - Output Protection Limiter
• Hand selected 12AX7A provides over 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
• TEC-Award nominated design
• 1 year warranty
• Designed for years of continuous, reliable performance
• Rugged all-steel construction