Fredenstein F676, 1-Channel Microphone Tube Preamp, vollsymmetrische Signalpfad, DSP-Technik, Ause a DSP to control the operating points of the tubes, large LCD-Display with Menu based User Interface, One Knob Operation, +48V Phantom Power, Phase Reverse, -20 dB input pad, XLR I/O, DI-Input, build-in Power Supply, Dimension: 9.5" 2U