Crown Audio 140MPA operation manual Welcome, Commercial Audio Series Mixer-Amplifiers, page

Commercial Audio Series Mixer-Amplifiers

1 Welcome

1.2 Front Panel Controls and Indicators

A. Input Signal Presence Indicator: Green LED, one for each input channel, illuminates when input sig- nal exceeds –40 dBu.

B. Input Volume Controls: Four controls, one per input. Detented potentiometers with knobs.

C.Master Output Volume Control: Detented poten- tiometer with knob.

D. Output Signal Presence Indicator: Green LED illuminates when output signal level exceeds 100 mV (45 dB below full power) from the 4-ohm tap.

E. Clip Indicator: Red LED on output illuminates at threshold of audible distortion.

F. Power Indicator: Blue LED indicates power on.

G., H. Tone Controls: Bass and Treble non-detented recessed potentiometer on each input channel. Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz.

I.Power Switch: Pushbutton on-off switch.

Figure 1.1 Front Panel Controls and Indicators

page 6 Operation Manual