Crown Audio 28M Input Volume Controls, Output Volume Controls, Output Signal Presence Indicator

Commercial Audio Series Mixers

1 Welcome

1.2 Front Panel Controls and Indicators

A. Input Signal Presence Indicator

Green LED, one for each input channel, illuminates when input signal exceeds –24 dBu (line) or –70 dBu (mic).

B. Input Volume Controls

Microphone/line, four in 14M, eight in 28M. Detented potentiometers with knobs.

C. Output Volume Controls

One per output channel. Detented potentiometer with knob.

D. Output Signal Presence Indicator

Green LED, one for each output channel, illuminates when output signal level exceeds 100 mV.

E. Clip Indicator

Red LED, one per output channel, illuminates at threshold of audible distortion.

F. Power Indicator

Blue LED indicates power on.

G, H. Tone Controls

Bass and Treble non-detented potentiometers on each input channel. Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz.

I. Power Switch

Pushbutton on-off switch. The power switch does not affect the 24V DC auxiliary power input (letter “K” on next page).

Figure 1.1 Front Panel Controls and Indicators

page 6 Operation Manual