The ART TPS II is an ideal preamplifier for any application, its tube design adds warmth and texture to any audio source. These high-performance dual-channel preamplifiers use the famous 12AX7A tube, which, together with ART's patented V3 (Variable Valve Voicing) and variable input impedance, allows the TPS II to deliver incredible performance.V3™ TechnologyV3™ provides optimized starting points to kick off the recording process. The V3™ presets were created and tuned by some of the industry's best studio and live sound engineers. V3™ technology allows you to choose from a multitude of presets designed for guitars (electric and acoustic), keyboards, bass, drums, vocals, and more.Variable input impedanceThe variable input impedance further expands the sonic potential of the TPS II. It provides completely new sonic textures and tones by varying the preamplifier's input impedance, which in turn changes how the microphone reacts to the preamplifier's load. This creates a wide range of new sonic possibilities with any modern or vintage condenser, ribbon, or dynamic microphone.