Fredenstein Artistic MIC-PRE - Manual (Page 4)

Fredenstein Artistic Microphone Preamplifier
Gain Control:
Microphone Preamplifier Gain Control, minimum +15 dB, maximum +65 dB
POL – Polarity Control:
Pushing the POL switch selects the polarity, when lit (blue), the output polarity is reversed.
Otherwise the true, non-reversed, polarity is selected (normal operation).
PAD – Input Attenuator:
Setting the PAD switch (orange light) activates a 20dB attenuator at the input allowing line level
signals to pass through the preamplifier (note: Pad is not affecting the DI input)
Low Z – Low Inout Impedance:
When lit (green), the input impedance changes from 1500 Ohms to 300 Ohms. Some dynamic- and
ribbon-microphones only work linear on a low input impedance.
P48 Phantom Power:
Most FET condenser microphones as well as some other microphones with built-in amplifiers
require +48V Phantom Power. Setting the P48 switch (red light) enables +48V through the balanced
microphone line. Please check your microphone documentation if you are not 100% sure. Enabling
P48 on microphones not designed for P48 might cause severe damage to the microphone. The DI
input is not supplied with Phantom Power.
DI – Direct Input:
The most common use for the DI input is to connect instruments like guitars directly to the Artistic
Pre. The input impedance is greater than 100 KOhm to insure compatibility with most instrument
pickups. After inserting a balanced (Tip-Ring-Sleeve) or an unbalanced (Tip-Sleeve) plug, the
balanced microphone input through the box or rack is automatically disabled.
Technical Data:
Frequency Response : 20 Hz – 20,000 Hz, +/- 1 dB
Distortion : < 0.02% at +4 dBu output level
Input Noise : < -127 dB
Input Impedance : > 1500 Ohms or 300 Ohms selectable
DI Impedance : > 100 KOhms
Max. Input Level : + 24 dBu, Pad activated
Output Impedance : 600 Ohms
Max. Output Level : + 26 dBu
Input Attenuator : - 20 dB (switchable)
Fredenstein Artistic Pre Manual V1.0 Aug 11, 2014 Page 3