Crown Audio ADDENDUM 28M 用户手册
Commercial Audio Series Mixers
page 6
Operation Manual
Figure 1.1 Front Panel Controls and Indicators
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).
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.
Microphone/line, four in 14M, eight in 28M. Detented
potentiometers with knobs.
C. Output Volume Controls
One per output channel. Detented potentiometer with
knob.
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.
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
thresh old of audible distortion.
Red LED, one per output channel, illuminates at
thresh old of audible distortion.
F. Power Indicator
Blue LED indicates power on.
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.
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).
Pushbutton on-off switch. The power switch does not
affect the 24V DC auxiliary power input (letter “K” on next
page).