Bose 2150 Installer's Manual - Page 8
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4.0 Operation
4.1 Front Panel (Cont.)
°
1
1
Level Controls
2
Status Indicators
3
Level Indicators
2. Level indicators
Ch 1
Ch 2
Clip
Clip
-6dB
-6dB
-12dB
-12dB
-20dB
-20dB
Signal
Signal
The level indicators (see Figure 2) for each channel reflect the gain of each output stage. The
following LEDs light up when the signal reaches each respective threshold:
• CLIP – red light indicates the signal is clipping (0dB)
• -6dB – yellow light indicates the signal is at -6dB below clip
• -12dB – green light indicates the signal is at -12dB below clip
• -20dB – green light indicates the signal is at -20dB below clip
• SIGNAL – green light indicates the signal is at -40dB below clip
It is common to operate the amplifier so that the CLIP (red) LED illuminates at the loudest
point. If the CLIP LED remains on for an extended length of time or clipping is audible, then
the level should be reduced on the channel(s).
3. Status indicators
Thermal
Thermal
Protect
Protect
Ready
Ready
Status indicators are visible for the following (See Figure 3):
THERMAL – A red light indicates when the amplifier temperature has exceeded its working
limits. When the THERMAL LED illuminates, both channels of the amplifier will become
muted. The amplifier will shut down and reset itself when conditions return to a safe operat-
ing temperature.
8
Ch 1
Ch 2
Clip
Clip
-6dB
-6dB
-12dB
-12dB
-20dB
-20dB
Signal
Signal
Thermal
Thermal
Protect
Protect
°
Ready
Ready
0dB
2
4
Network Activity Indicator
5
Standby Indicator
6
Power Switch
Network
0dB
3
4
7
Removable Rack Ears
November 19, 2001
M 2150
Commercial Power Amplifier
Power
On
Off
Standby
5
6
7
Figure 2
Level indicators
Figure 3
Status indicators
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