User guide

© 2009 Wohler Technologies, Inc. All rights reserved.
10
AMP1A Series User Guide
Front Panel Controls
AMP1A-30-Specific Front Panel Controls
Figure 1–2 AMP1A-30 Front Panel
• Level Meters: The AMP1A-30 features two, 30-segment, bar graph
audio meters.
• Level Meter Brightness (Recessed Rotary Switch): This control is
recessed into the front panel and can be accessed using a small
flathead screwdriver. Turning it clockwise will increase the relative
brightness of the bar graph LED segments. Adjusting this one
control will simultaneously affect the brightness of both bar graph
displays.
Example If an audio signal of a voice speaking English is fed to the "A" (left)
input and a voice speaking Spanish is fed to the "B" (right) input, then
the left speaker channel will reproduce the mid-range and high-range
frequencies of the English speaking voice, the right speaker channel
will reproduce the mid-range and high-range frequencies of the
Spanish speaking voice, and the woofer speaker channel will
reproduce the summed (combined) low-range frequencies of both
voices.
If the balance control is panned to the left, then the Spanish speaking voice in
the right speaker channel will diminish in volume, the Spanish speaking
voice in the woofer speaker channel will also diminish, and the English
speaking voice in both the right speaker channel and woofer speaker
channel will increase slightly (to maintain overall output level). The
converse is true if the balance control is panned to the right.
Speakers
Headphones
Level Meter Brightness
Level Meters
Volume
Balance
Power