E-MU 0204 USB 2.0 - Manual (Page 14)

Input/Output
14 E-MU Systems
INPUT/OUTPUT
8. USB
Connects the 0204 USB to your computer via the supplied USB cable. The
USB connection provides two-way communication when connected to the
computer.
The 0204 USB receives its power from the USB. Always connect to the USB
jack on the computer itself and NOT to a low-power USB connection that
may be present on your computer keyboard or other USB peripheral.
9. Main Outputs
The unbalanced outputs are normally connected to your monitoring system.
The signal is duplicated on a stereo 1/8¨ jack for easy connection to desktop
stereo speakers. The outputs have been designed using a special noise-
cancelling circuit which reduces problems relating to ground loops.
The main output volume can be controlled using the System Volume Control
on your Mac or PC (WDM only on PC).
10. R - Hi Z / Line Input
This 1/4¨ input can be used as a Hi-Z instrument input (guitar/bass, etc.) or a
line level input. The input is balanced, but accepts either balanced or unbal-
anced signals.
11. L - 1/8¨ Mic Input
This 1/8” mini-phone jack is designed to accept an electret condenser micro-
phone. The jack supplies +5VDC phantom power required by electret mics.
12. L - Hi-Z / Line / Mic Input
Use the XLR connector for microphones or balanced line level signals. Use the
1/4¨ in the center of the XLR jack as a Hi-Z input for guitar/bass, or as a line
level input. The input is balanced, but accepts either balanced or unbalanced
signals.
13. Ground Lift Switches
The “ground lift” switches, located on the bottom of the unit, can be used to
safely stop the hum if a ground loop occurs in your setup. See
page 19 for
more information.
8 10 11 12 9 13
System Volume Control
Mac
PC
L-GND LIFT
R-GND LIFT
Input Ground Lifted
Input Grounded
The input ground is lifted when the A or B slide switch is closest to the GND LIFT label.