© 2004 Wohler Technologies Inc. ALL rights reserved
10
AMP2-DA/AVU
and
AMP2-DA/APP
User Manual P/N
821584
Rev-
A
9
10
Section 2:
Operation
(Continued)
Front Panel Features
Phase Indication LEDs
These three LEDs indicate the instantaneous and average phase (polarity) conditions between the two signals in the channel
pair (or downmix) assigned to the left and right speaker channels. The two smaller LEDs labeled
FAST
show
instantaneous
phase relationships in the signal. The larger LED labeled
AVG
will indicate the
average
phase condition. Indication is as
follows:
•
The
left
FAST
LED glows (or blinks) GREEN for
in-phase
signals.
•
The
right
FAST
LED glows (or blinks) AMBER for
out-of-phase
signals.
•
The large
AVG
LED indicates the
average
phase condition by glowing GREEN for
in-phase
signals, or RED for
out-of-phase
signals.
In general, observing the
AVG
LED alone is sufficient for proper phase monitoring. While it is normal for stereo signals to
contain some intermittant instantaneous
out-of-phase
and
in-phase
conditions (
FAST
LEDs), a steady RED glow of the
AVG
LED indicates an
out-of-phase
alarm condition.
Balance Control
This control changes the volume balance between the left and right speaker channels. Note that this control attenuates the
signal from the source, so that the left and right
bass
frequencies (summed together and reproduced in the woofer channel)
will respond to balance adjustments in tandem with the left and right speaker channels. See page
16
for more information
concerning the balance control characteristics.
