User's Manual

Fredenstein HD Microphone Preamplifier
Technical Data:
Frequency Response : 12 Hz – 700,000 Hz, +/- 1 dB
Distortion : < 0.0082 at +4 dBu Output Level (31 dB Gain)
Input Noise : < -131 dB at 150 Ohms Source Impedance (64dB Gain)
Input Impedance : > 200 kOhms or 1000 Ohms selectable
DI Impedance : > 2 MOhms
Max. Input Level : + 20 dBu,
PAD attenuation : - 20 dB
Output Impedance : 600 Ohms
Max. Output Level : + 26 dBu
Max Input Signal : +20 dBu (PAD activated)
(DI or Microphone Input) + 0dBu (without PAD)
Fredenstein HD Pre Manual V1.1 May 6, 2015 Page 7