Versitile mic preamp with multiple voicings and a stellar noise floor. Very handy front-panel microphone input. Item was pulled from a working rack and is in good condition.

From Radial:

"The PowerPre is high performance mic preamp designed for the 500 series modular format. It features 100% discrete electronics throughout to deliver over +55dB of gain, making it suitable for both dynamic and condenser microphones. Accustate front end simultaneously adjusts the input sensitivity and gain to ensure lowest noise at all levels. Connection is easy using a front-mounted XLR. A ten-segment LED provides visual feedback to avoid overload. Driving the PowerPre into the red is encouraged. This pushes the circuit and Hammond output transformer hard to create added character. This is augmented with a 3 position ‘VOX’ control that adds air or bottom end when needed. Extra features include -15dB pad for high level instruments, high-pass filter to eliminate low frequency rumble, 180° polarity reverse to help phase align mics and a 48V phantom switch that is recessed to protect mics and audio system from turn on transients."