Thomann FetAmp, Microphone Preamplifier, Extremely low-noise Class A JFet amplifier, For dynamic and ribbon microphones, 2 Matched JFet transistor pairs, Input: Balanced 3-pin XLR female, Output: Balanced 3-pol. XLR male, Input impedance: 20 kOhm, Gain: 28 dB (@ 3 kOhm source impedance), Frequency response: