Issue 5, April 1994
Mic-PreEminence User Guide
Page 16
Studio Technologies, Inc.
Appendices
Appendix A
Specifications
Mounting
One space in a standard 19-inch (48.3cm) rack
AC Mains Requirements
115Vac or 230Vac,
±
10%, switch selectable,
50/60Hz, 10 watts
Fuse
0.5A 115V, 0.25A 230V; units shipped to North
America use 3AG type, units shipped outside North
America use 5x20mm type
Number of Preamplifier Channels
2
Connectors
Microphone Inputs: XLR-type female, pin 2 high
Balanced Outputs: XLR-type male, pin 2 high
Unbalanced Outputs: ¼-inch, 2-conductor phone
jack
AC Mains: standard 3-blade plug, meets IEC 320
specifications
Microphone Inputs Type
Electronically balanced, capacitor coupled
Phantom Power
48
±
0.1Vdc, current limited via 6.81k ohm feed
resistors, on/off individually switchable for each
channel
Input Impedance
7.8k ohms
Noise
–69.5dB at 60dB Gain (i.e. –129.5dB EIN, which is
one dB above theoretical minimum) –103dB at 30dB
Gain (20Hz to 20kHz bandwidth, 150 ohm resistor
on input)
Frequency Response
+0/–1.5dB, 20Hz to 60kHz, 40dB Gain
+0/–0.5dB, 10Hz to 90kHz, 68dB Gain
Gain Range
+12 to +68dB, related to balanced output
Slew Rate
20V/usec
Distortion (THD)
0.0020%, 20Hz to 20kHz, 30dB Gain
Input to Output Phase Shift
9 degrees maximum, 20Hz to 20kHz
Input Common Mode Rejection
70dB, 20Hz to 20kHz, 30dB Gain
Balanced Outputs Type
Electronically balanced
Output Impedance: approximately 100 ohms
Output Level at Clipping (0dBu=0.7746V):
+30dBu into 10k ohms Balanced
+29dBu into 600 ohms Balanced
Unbalanced Outputs Type
Electronic
Nominal Output Level (0dBv=1V): –10dBv (techni-
cally the unbalanced output is set to be 11.8dBu
below the nominal balanced output of +4dBu)
Output Impedance: approximately 200 ohms
Output Level at Clipping (0dBv=1V): 16dBv into
10k ohms
Intended Load to Unbalanced Output: the
unbalanced outputs are intended to be connected
to loads of 10k ohms or greater
Dimensions (Overall)
19.00 inches wide (48.3cm)
1.75 inches high (4.5cm)
7.00 inches deep (17.78cm)
Weight
4.2 pounds (1.9kg)
Specifications and information contained in this user
guide subject to change without notice.
