Stewart Audio CVA50-1 - Manual (Page 8)

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3.2 Controls, Indicators, and Connectors 3.2.1 Indicators
CVA Series amplifiers have three rear panel LEDs to indicate the status
of the amplifier. The blue LED, labeled “ON”, will be lit when the unit
is not in sleep mode. The green LED, labeled “SIG”, will light when an
audio signal is present on the audio input. When the unit is operating
with both green and blue LEDs lit and the audio input signal goes away
or is removed, the green “SIG” LED will go out and the unit will con-
tinue to operate with the blue LED on for approximately 5 minutes be-
fore going into sleep mode. When signal is present and output is going
to the speakers the red LED, labeled “Clip”, will light when the input
signal is too hot. The “LEVEL” control must be adjusted until the CLIP
LED goes out for undistorted sound amplification.
3.2.2 Controls
All CVA Series controls are located on the rear of the unit. There is no
power switch so the amplifier will power up into a sleep state when
power is first applied. The CVA Series Signal Sense Technology (SST™)
will power up the amplifier from sleep when a signal is detected. After
5 minutes without an input signal the amplifier will go into sleep mode.
The rear panel contains a single volume knob. The amplifier is set to
run off of a line-level source and the level should be adjusted for opti-
mum performance. To adjust this knob, you will need a small flat-head
screwdriver. While a typical program source level is present, spin the
rotary knob as far clockwise as you can without hearing distortion or
without the “Clip” indicator illuminating. If the signal is distorting and
the knob is all the way counter-clockwise, adjust the gain down at the
source level.
3.2.3 Remote Volume Control
CVA Series amplifiers can have their volume remotely controlled (or
muted) via the Euro Block input on the rear of the amplifier. The remote
volume control allows the units volume to be controlled through the
use of an external potentiometer which can be located wherever con-
venient for the user. Remote muting is also useful for fire-alarm situa-
tions in which all unnecessary sound must be silenced.
NOTE: If the remote volume control connector is utilized,
it will override the volume knob on the rear of the unit.
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2
3 6
7
8
Volume Level Knob
Input Connector
Remote Volume Control
Clip Indicator LED
Power Connector
Output Connector
4
5
Power Indicator LED
Signal Present Indicator LED
PLENUM RATED
ON SIG CLIP
SPEAKER
+ +
+
PWR
25V 70V
RVC
+10V RVC GND MUTE - +
INPUT
LEVEL
CVA 25-1
1
2 3
6
7 8
4 5