User manual

00039532.DOC, Version 2.1
18/20
5. INSTALLATION
5.1 Rack installation
Install the unit on a plane surface or in a rack. For 19" (483 mm) rack installation, 2 units are required. When
mounting the unit into the rack, please make sure that there is enough space around the device so that the
heated air can be passed on. Steady overheating will damage your device. You can fix the unit with four
screws M6 in the rack.
The gain controls and several other selector switches are located at rear panel. Make the basic
settings (chapter 6) before installing the unit in a rack or use a rack where the front and rear
panel can be opened.
5.2 Making the connections
Switch off the mixer prior to connecting any units or to changing any existing connections.
1. Connect the stereo audio sources to the corresponding RCA jacks of channels 1 to 5 (white jack = LEFT;
red jack = RIGHT):
• Connect units with line level output (e.g. CD player) to the jacks LINE
• Connect turntables with magnetic system to the jacks PHONO.
• If your turntable is equipped with a separate ground lead, connect it to the clamping screw GND.
2. You can connect two microphones via XLR plug or 6.3 mm plug to the microphone inputs MIC 1 and
MIC 2 on the front panel.
3. For connecting amplifiers or other subsequent units with line level inputs (e.g. a further mixer, active
speakers), three stereo master outputs are available for each PA zone: a balanced XLR output and an
unbalanced RCA output: outputs MASTER 1 for master channel ZONE 1, outputs MASTER 2 for master
channel ZONE 2, outputs MASTER 3 for master channel ZONE 3.
Via the assignment switches 1 to 3, the input channels can be switched to the individual master channels
as desired.
4. For sound recordings, two recording units can be connected to the recording outputs which are
connected in parallel: one unit to the front and one unit to the rear. The recording level is independent of
the position of the output controls OUT 1 to 3. Via the assignment switches REC SELECT 1 to 3, the
master channels 1 to 3 can be individually switched to both recording outputs. With the rear selector
switch WITH MIC/NO MIC, the level of the micorphone channels at the recording outputs can be
adjusted: »WITH MIC« for full level (basic setting) and »NO MIC« for reduced level.
5. The input channels can be monitored via stereo headphones. Connect the headphones to the 6.3 mm
jack PHONES on the front panel.
6. Connect the power supply unit to the AC input of the EM-650 and the mains plug to a mains socket.
Use the unit only with the supplied power unit. Always disconnect the mains connector when you wish to
change connections, move the unit to a different place or if it is not used for a longer period.
6. OPERATION
Prior to switching on, turn the output controls OUT 1 to 3 to minimum to avoid damage to the hearing by a
volume which is too high when switching on. Switch on the unit with the power switch. The power indicator
on the front panel lights up. Switch on the connected units. After operation, switch off the unit with the power
switch.
6.1 Level control of channels 1 to 5
1. Set all rear gain controls TRIM to mid-position with an appropriate tool e.g. a screw driver.
2. Set all tone controls to mid-position.
3. Use the input selector to select the input to which the audio source is connected.
4. Feed an audio signal (test signal or music piece) to the channel. Switch off the units which are to play on
the other channels or set them to pause.
5. Advance the channel fader to approx. 2/3 of its maximum.
6. Use one of the assignment switches (LED lights) to switch the input channel to the master channel which
is to be used for level control: button 1 for master channel ZONE 1, button 2 for master channel ZONE 2,
button 3 for master channel ZONE 3.
7. Advance the master control of the master channel used to approx. 2/3 of its maximum.