Gravis Series Front Panel And Function Description - Montarbo GRAVIS SERIES User Manual

Important: Control functions and adjustment functions not described in this user's manual may cause
mechanical danger or electrical shock.
GRAVIS series front panel function description:
1. Installation socket
To be used to fix in 19" rack installation.
2. Air entrance
This is the air entrance, don't block it. Since the dust will settle in the grille, please regularly remove
the screws to clean the filter under the grille, thus maintaining a good ventilation.
3. -5dB signal indicator LED
When signal is at -5dB, this orange LED will be lit.
4. CLIP indicator
When this indicator is on, it means the amplifier has distortion (CLIP). In this status, the distortion is
around 0.5%.
5. Protection Indicator
When this indicator is lit, it means the amplifier is in protection status, which should be due to output
short-circuit, over-heat,DC, VHF (constant non-musical high frequency signal due to self-excitation
or long time high-frequencies feedback).
6. -10 dB signal indicator LED
This green LED will be lit when signal at -10dB.
7. Signal indicator
With signal is up to -22dB, the green indicator LED will be lit. This LED is on with an input level
around 0.35V.
8. Power ON Indicator
When this indicator is on, it means the main power supply system of amplifier is working.
9. CH1 volume control
In stereo or parallel mode: this knob controls CH1 volume. In bridge mode, this knob controls both
channels volume, while CH2 knob is disabled.
Gain control range: -80dB~0dB in 40 steps, available turning angle is 280 degree.
10.Bridge indicator
When this indicator is lit the amplifier is on bridge mode, as set by rear panel dip switches.
11.Parallel indicator
When this indicator is lit the amplifier is on parallel mode, as set by rear panel dip switches.
12.CH2 volume control
In stereo or parallel mode, this knob controls CH2 volume. In bridge mode, this knob is inactive, the
amplifier volume is controlled by CH1 knob only.
Gain control range: -80dB~0dB in 40 steps, available turning angle is 280 degree.
13.Power Switch
This switch is used to turn power on and off. Press the upper part to switch ON, and lower part to
switch OFF.
GRAVIS 62
-6 -6
-5
-8 -8
PROT
CLIP
-5dB
-3 -10
-10dB
SIG
BRG PAR
-1
ON
-20 -20
-80 0 -80
dB dB
CH1 CH2
3
-5
-3
-1
0
ON
OFF