This particular unit has been kept in my smoke free studio in the same rack space since purchasing it. It has seen use for the recording of a couple albums (Abigail's Ghost - Black Plastic Sun on Spotify if you're interested in hearing it in action on bass and guitar).This auction also includes the required power supply unit normally priced at $225 Two Channels of 1073-Style Preamps The Vintech Audio 273 features two 1073-style microphone preamplifiers for less than the price of one vintage 1073! The 273 includes "essential EQ" on every channel. Vintech calls the high and low shelving EQ adjustments "essential" because they really help to enhance certain instruments and impart a certain magic to the sound like a vintage Neve 1073. Frequency choices are 5.6kHz and 12kHz for the highs and 60Hz and 110Hz on the low shelving but can be special ordered at other practical frequencies. Each channel also offers an input sensitivity adjustment allowing up to 70db of gain, an input impedance switch, a mic-line switch, an instrument input and switches for phantom power, phase reverse and EQ on or off. Vintech Audio 273 Features:Class A, all discrete, transformer balanced circuitryHigh and low shelving EQ on each channelImpedance adjustment and direct instrument inputsCustom-machined aluminum knobsThis auction also includes the Vintech Power Supply unit ($225 value)