Williams Sound Personal PA PPA T35, Manual And User Manual

Page: 17 / 36

C
OMPRESSOR
G
AIN
(M8)
The T35 has two selectable modes of compression: Normal and Reduced. For applications such as
music and voice, where the highest audio quality is desirable, Reduced compression is the recommended
mode of operation. Reduced compression minimizes the amount of boost and disturbances in the sound
which compression can cause.
For hearing assistance or applications where the transmitting message is critical for listening, the T35 can be
set to Normal Compression gain. Normal compression boosts the “soft” audio sounds for a more understand-
able, consistent delivery. This may be appropriate for applications where the listening audience has moderate
to severe hearing loss. Additional compression can be added (if desirable) by adjusting the Compressor Slope
control. See page 16. Normal compression gain is generally not desirable for applications such as music,
concerts, etc.
NOTE: The T35 is shipped from the factory in the Reduced mode.
To select Reduced or Normal Compression:
1) Press the “ ” menu button (Figure 12) to access the LCD “Compressor Gain” (M8) screen.
2) Press the “+” or “-” menu buttons to select between Reduced and Normal compressor gain.
3)
When the desired compressor gain is displayed, press the “Set” button to save the change into memory.
No additional action is necessary. After 30 seconds of inactivity, the LCD screen will return to the
default display.
NOTE: The installer must take care in using compression. Adding too much compression may con-
tribute to excessive noise in the listener’s receivers.
Williams Sound
®
Helping People Hear
17
1.0:1
RA
TIO
(NO
C
OMPR
ESSIO
N)
3.5:1
RATIO
6.0:1
RA
TIO
(REDU
CED)
1.0:1 RATIO
NORMAL or REDUCED GAIN
3.5:1 RATIO
REDUCED GAIN
3.5:1 RATIO
NORMAL GAIN
COMPRESSION GAIN:
REDUCED ADJUSTMENT
RANGE
AUDIO INPUT LEVEL (RELATIVE)
LEVEL INDICATOR
REFERENCE:
AUDIO OUTPUT
LEVEL
IN RECEIVER
(RELA
TIVE)
COMPRESSION GAIN:
NORMAL ADJUSTMENT
RANGE
+20 dB
-40 dB
-30 dB
-20 dB
-10 dB
0 dB
+9 +6 +3 0 –3 –6 –9 –12 –15 –18
+10 dB 0 dB -10 dB -20 dB -30 dB
FIG. 13: A
UDIO
P
ERFORMANCE
U
SING
C
OMPRESSION
IMPORTANT: Listen to the transmitted audio through the headphone jack, especially when
deciding on an appropriate compressor gain and slope. This is a good way to ensure the lis-
tening audience is going to receive the highest audio quality.
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