ART Pro Audio ProChannel II - Manual (Page 11)

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FIGURE 4 – Signal Flow Block Diagram
Master Output Control
The OUTPUT LEVEL control provides gain or attenuation to adjust for a variety of system operating levels.
This control affects the levels sent to the A/D converter and to the balanced analog OUTPUT jacks.
Output Meters
The ART Pro Channel II™ provides both analog VU and LED level meters.
The analog VU meter displays the signal level various points of the processor depending on the setting of
the VU Meter Switches. “0” VU on the analog VU meter corresponds to +4dBu on the balanced output.
The upper LED bargraph displays how hard the tube section is being driven (Warmth). The last two LEDs in
the meter are marked “Clip” indicating that the preamp section's gain is set too high.
VU Meter Switches
These switches allow you to monitor the level at the Preamp output, Compressor output, EQ section or the
Main output.
When both switches are out (POST/MAIN) the meter displays the output level at the Output jack of the unit.
When the Pre switch only is depressed (PRE/MAIN) the meter monitors the EQ section output (Pre output
level control). The actual point that is monitored is After the EQ Bypass switch.
Depressing the Second switch allows you to see the levels before or after the Compressor. If Post is
selected the signal after the Compressor Bypass switch is displayed (the same signal present on the Comp
Out jack on the rear panel). Depressing the PRE and COMP switches select the output of the Preamp section
(the same signal present on the Preamp Out jack on the rear panel).