Fredenstein F609, 1-Channel Tube Mic-Preamp 500 Module, two double-triodes (ECC802S and ECC803S), american made input and output transformers, -20 dB Pad, polarity control, +48V phantom power, two stage low-cut filter, standby mode, DI-Input 1/4" TS Jack 500kOhm, max. Input Level: +12 dBu, max. Output Level: +26 dBu, max. Input Level: +12 dBu, back-lighted VU-Meter, Clip LED, Housing: 500er Module