821020: AMP1A Series User Guide
© 2010 Wohler Technologies, Inc. All rights reserved.
9
AMP1A Series User Guide
Front Panel Controls
Front Panel Controls
Common Controls
•
Speakers
: The AMP1A internal speaker system is comprised of two
mid-range tweeter speakers (left and right) and two woofer
speakers (left and right). The two mid-range speakers reproduce, in
stereo, only the mid and high frequencies, while the two woofer
speakers monaurally reproduce the low frequencies.
•
Volume Control
: This controls the loudness of the audio
reproduced by the internal speakers or connected headphone.
Clock-wise rotation of this control increases the loudness of the
monitored audio.
•
Headphones
: The headphone output monitors the same audio
signals as monitored through the internal speakers. However, when
you plug in headphones, the internal speakers will mute. This jack
accepts a standard 1/4” phone type stereo plug.
•
Power LED
: This LED glows green to indicate the monitor is
connected to operational mains power.
•
Audio Level Meters
: Audio levels are visually displayed via thigh-
resolution tri-color (red, amber, green) LED bar graph display level
meters. The upper level meter monitors Channel A (left) while the
lower level meter monitors Channel B (right). These bar graph
displays feature an auto-calibration feature and are user adjustable
for display mode and reference level via a rear panel DIP module.
Peak hold, PPM ballistics, and alternative scales can be set through
an internal DIP switch.
•
Balance Control
: This pans the volume balance between the left and
right speakers. The balance control attenuates the signal from the
source, so that the left and right bass frequencies (summed together
and reproduced in the woofer channel) will also respond to the
balance control.
