Installation And Connection - Alto APM80.QUAD User Manual

5. INSTALLATION AND CONNECTION

Ok, you have got to this point and you are now in the position to successfully operate
your APM80.QUAD. However , we advise you to read carefully the following section to
be the real master of your own mix. Not paying attention enough to the input signal
level, to the routing of the signal and the assignment of the signal will result in unwanted
distortion, a corrupted signal or no sound at all. So you should follow this procedure
for every single channel:
1. Turn down all Input and output gain controls.
2. Connect phantom powered microphones before switching on the +48Volt phantom
power switch.
3. Set the output level of your APM80.QUAD or the connected power amplifier at no
more than 75%.
4. Now, set the MONITOR level at no more than 50%. In this way you will be able to
hear later what you are doing connecting a pair of headphones or a pair of powered
studio monitor speakers.
5. Position EQ controls on middle position.
6. Position panoramic (PAN) control on center position.
7. Increase the input gain properly for maintaining the good headroom and ideal dynamic
range.
8. Depending on the actual application, turn slowly the input and output level controls
for obtaining the maximum gain before distortion.
9. Now repeat the same sequence for all input channels. The main LED meter could
move up into the red section. In this case you can adjust the overall output level
through the MAIN MIX control.
Audio Connections
Y ou can connect unbalanced equipment to balanced inputs and outputs. Simply follow
these schematics.
Strain Clamp
Strain Clamp
Ring=Right Signal
Tip
Sleeve
Ring
Sleeve=Ground/Screen
Use for Headphone
1/4" Stereo (TRS) Jack Plug
Tip
Sleeve
Sleeve=Ground/Screen
Use for Mono Line In, Mono 1/4"Jack Plugs
1/4" Mono (TS) Jack Plug
Tip=Left Signal
Tip=Signal
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