User guide

AMP2A-10S User Guide

Front Panel Features

• Speakers: The AMP2A series internal speaker system is comprised

of two mid-range tweeter speakers (left and right) and one woofer

speaker (center). The two side channel speakers reproduce, in

stereo, only the mid and high frequencies.

• Power Indication LED: This LED glows green to indicate the

AMP2A-10S unit is connected to mains power and an operation

voltage is present.

• Audio Level Meter LED Bar Graph Displays (1 and 2):Audio

levels for the selected 2-channel source are visually displayed via

these two 20-segment, tri-color LED bar graph meters. Dynamic

range for these meters is 44 dB and they are able to display signal

levels using either PPM or VU standards. Both the input level gain

calibration and VU/PPM display mode for each of the two meter

bar graphs is user selectable via two DIP switch modules accessible

through the top cover of the unit (see page*** for DIP switch

settings).

Contact the factory for additional information concerning meter

scales and ballistics.

• Volume Control Pot: 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.

• Headphone Jack: Select the headphone audio sources as you

would for the internal speakers. When you plug in headphones, the

speakers will mute. This jack accepts a standard 1/4” phone type

stereo plug.

• Phase Indication LEDs:These three LEDs offer instant verification

of phase (polarity) conditions in the pair of channels selected for

monitoring in the left/right channel speakers. There are three LEDs;

the two smaller LEDs labeled

FAST-IN and FAST-OUT show

instantaneous phase relationships in the signal, while the larger

LED, labeled

AVG, will indicate the average phase condition.

The small FAST-IN LED glows (or blinks) GREEN when signals are

in-phase. The small

FAST-OUT LED glows (or blinks) amber for

out-of-phase signals. The larger AVG LED indicates the average

phase condition by glowing green for in-phase conditions, or red for

out-of-phase conditions. In general, it is sufficient to regard the AVG

LED (average phase condition) as adequate for proper phase

monitoring. While it is normal for stereo signals to contain some