ART ProMPA II ART ProMPA II is a new generation of affordable high-performance tube microphone preamps. Each microphone input circuit, with selectable 48V phantom power, offers variable input impedance that can radically alter the overall characteristics of any high-quality dynamic or ribbon microphone. The ProMPA II can be configured for dual mono or stereo operation with mid/side microphone support, summing the adjacent channel to decode left and right signals.

The ProMPA II can operate at either low or high plate voltage on the two integrated hand-selected 12AX7 tubes, allowing for a wider variation of preamp tone and performance. Large backlit analog VU meters display output levels while multi-colored LED arrays, with average or peak hold, show tube gain and digital output levels.

Housed in a standard 2U rack-mountable steel chassis, with a black anodized aluminum front panel, the ProMPA II is designed to deliver years of reliable operation in the studio or on the road for live sound reinforcement.

Main Features Variable input impedance (150 ohms to 2400 ohms) Selectable plate voltage Large VU meters Backlit function switches Discrete Class-A microphone preamplifier Low noise at lower gain settings Extremely low total harmonic distortion (THD) Wide frequency response Additional front-mounted instrument input jack Supports mid/side recording technique Operates at +4dBm/-10dBV output Selectable stereo/dual mono operation of output controls Automatic instrument input selection Specifications Dynamic range: >110 dB (“A” weighted) Frequency response: 15 Hz to 48 kHz (+0, -1 dB) Harmonic distortion THD: 800 kΩ (1/4”) Output impedance: