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1. Power Switch -
This switch is used to control the units main power.
2. Channel 1 Gain Control -
This rotary knob is used to control the out-
put signal of channel one. Turning the knob in a clockwise direction will
increase signal output.
3. Channel 1 Limiter Switch -
This is used to activate the channels
built-in limiter. The limiter reduces the average input level when the sig-
nal begins to distort, this process is designed to reduce distortion and
protect the speakers. See limiter page 12.
4. Channel 1 Clip Indicator -
This red LED will begin to ash when
channel one begins to overload (clip). At this point channel one will be-
gin to distort. Under heavy clipping activity lower the channel one gain
control to reduce the risk of damage to your speakers and ampli er. This
LED may glow when the unit has been turned off, this is normal.
5. Channel 1 Protect Indicator -
The red Protect LED will begin to glow
when the channel goes into protect mode. When the channel goes into
protect mode all output for that channel will turn off. This is to protect any
speakers connected to the channel.
6. Channel 1 Overheat Indicator -
This indicator will begin to glow
when the channel goes into thermal protection mode. When the unit
goes into thermal protection, channel output will turn off. See “Thermal
Protection” page 13.
7. Channel 1 Signal Indicators -
These green and yellow LED’s will glow
according to the average signal output.
©American Audio® - www.americandj.com - V4000plus™ Power Amplifier User Manual Page 5
Front Panel Control
POWER
ON
OFF
LIMITER
ON
PROFESSIONAL POWER AMPLIFIER
LIMITER
ON
MONO STEREO BRIDGE
-15dB
SIGNAL
-10dB
-5dB
CLIP
PROTECT
OVER HEAT
0
10
0
10
1
1
9
9
8
8
6
6
5
5
4
4
3
3
2
2
7
13
13
12
12
11
11
10
10
14
8. Function Indicators -
These indicators detail the operating mode of
the ampli er. These LEDs will also function as a power indicator.
9. Channel 2 Overheat Indicator -
This indicator will begin to glow
when the channel goes into thermal protection mode. When the unit
goes into thermal protection, channel output will turn off. See “Thermal
Protection” page 13.
10. Channel 2 Protect Indicator -
The red Protect LED will begin to
glow when the channel goes into protect mode. When the channel goes
into protect mode all output for that channel will turn off. This is to pro-
tect any speakers connected to the channel.
11. Channel 2 Clip Indicator -
This red LED will begin to ash when
channel one begins to overload (clip). At this point channel one will be-
gin to distort. Under heavy clipping activity lower the channel one gain
control to reduce the risk of damage to your speakers and ampli er. This
LED may glow when the unit has been turned off, this is normal.
12. Channel 2 Limiter Switch -
This is used to activate the channels
built-in limiter. The limiter reduces the average input level when the sig-
nal begins to distort, this process is designed to reduce distortion and
protect the speakers. See limiter page 12.
13. Channel 2 Gain Control -
This rotary knob is used to control the
output signal of channel two. Turning the knob in a clockwise direction
will increase signal output.
14. Channel 2 Signal Indicators -
These green and yellow LED’s will
glow according to the average signal output.
Diagram 1