Alto PBM4 SISTEMA Owner's Manual - Page 12
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5. INSTALLATION AND CONNECTION
Ok, you have got to this point and you are now in the position to successfully operate
your PBM4. 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 +15 Volt
phantom power switch.
3. Set the output level of your PBM4 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. Increase the input gain properly for maintaining the good headroom and ideal
dynamic range.
7. Depending on the actual application, turn slowly the input and output level controls
for obtaining the maximum gain before distortion.
8. 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.
Stran Clamp
Strain Clamp
Ring Right Sgnal
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 Sgnal
Tip Signal
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