Snell XA 55cr, Owner'S Manual

Page: 14 / 20

14
O P T I M I Z I N G T H E S O U N D
LFE LEVEL
LFE INPUT
REMOTE LINK
POWER
ON
ALWAYS
ON
FUSE
T5A
250 V
60 HZ
120 V
550 W
MUSIC SENSE
AUTO
-8
-10
-12
-3
+3
MIN.
MAX.
0
PARAMETRIC EQ
0
-2
LEVEL
(dB)
BANDWIDTH
(0ct)
+2
-5 +5
0.9
0.5
0.2 1.5
1.2
1.0
-10
+10
FREQ.
(Hz)
50
36
30
32
100
65
40
80
OVERALL
BASS LEVEL
OFF
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Subwoofer Amplifi er Settings
The amplifi er of the XA 75LE contains a number of rear
panel controls, some of which should be set upon instal-
lation and then generally left alone. Note: In the XA75LE
the remote control contains additional controls for user
adjustment according to taste or program material.
It is best if a qualifi ed installer aids in this initial setup,
hopefully with a 1⁄3-octave real-time spectrum analyzer
and a pair of good ears.
Overall Bass Level
This control sets gain for the bass amplifi er that deter-
mines bass level for the normal (speaker level) input and
also the LFE linelevel input.
Note: In the XA 90ps, overall Note: Note:
bass level is a combination of the levels set by this knob
and by the remote control. Use the remote control to set
the amplifi er to the 0 position. Adjust the bass level to
give a solid but not overblown bass level. Confi rm this
on a variety of program material. If using a spectrum
analyzer, set to a level so that frequencies below 100Hz
are fl at (or up to 3dB up from fl at). The remote control
will then give a range of ±6dB in 2dB steps from this
central position.
Parametric Equalizer
The XA 75LE is unique in including a bass parametric
equalizer. Through several years of experience with the
amazing RCS1000 digital equalizer, we have learned
fi rsthand the damaging effects of the room on bass
reproduction, and how careful equalization can greatly
reduce these effects. The dimensions and materials of a
room create “standing waves.” The locations of speak-
ers and listener relative to these standing waves create
uneven bass response. The parametric equalizer of the
XA 75LE allows you to pick the room’s dominant bass
problem and correct it. The end result is bass response
that will be more even, more musical, and less “reso-
nant.”
The term parametric equalizer stems from the fact that
all parameters of an equalizer section are adjustable.
This includes bandwidth (also called Q), frequency, and
level. With the parametric equalizer, you have the option
of making broad effects (more or less low bass; more or
less mid-bass) or tackling narrow band effects, such as
notching out a room resonance at 70Hz.