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: 10 - 50,000 Hz (+/- 1 dB), Requires phantom power: 24 - 48 V., Dimensions (L x W): 77 x 22 mm, Weight: 35 g, Developed and produced in Germany@+*Note:* Does not allow phantom power to pass through to the microphone