Img Stage Line MPA-102 Microphone Preamplifier

The MPA-102 is a single-channel low-noise microphone preamplifier designed for professional audio applications, allowing versatile operation via mains power or battery. This compact unit features a balanced XLR microphone input with switchable 24V phantom power and adjustable gain ranging from 20 to 70 dB in 11 precise steps. Integrated LED indicators provide clear visual feedback for operating status and peak levels. For enhanced signal control, the preamplifier includes switchable microphone phase inversion and selectable high-pass (100 Hz) and low-pass filters (12 kHz) with 12 dB per octave slope. Additional connectivity options include a preamplifier output, a stereo line input, and a stereo line output, complemented by level and pan controls for mixing microphone signals with stereo line channels. Technical specifications include a frequency response of 20 to 20,000 Hz, an adjustable input sensitivity of 0.3 to 150 mV, and input impedances of 2.2 kΩ for microphone and 10 kΩ for stereo line. Outputs deliver balanced line signals up to a maximum of 12 V, with a signal-to-noise ratio of over 66 dB for microphone and 80 dB for line inputs, as well as a total harmonic distortion of less than 0.01 percent. Power is supplied via an included power adapter or four 9V batteries. The unit measures 116 mm in width, 55 mm in height, and 125 mm in depth, ensuring portability and easy integration into various audio configurations.