Pioneer SC-LX90 - Manual (Page 62)

Other connections 07
62
En
Switching the speaker system
according to the playback environment
(Application Manual)
With the amplifier, the combination of the speaker
system A/B selection with the surround back channel
processing selection (page 37) can be used to switch
between the speaker configuration for high sound quality
multi-channel music sources (DVD Audio discs, SACDs,
etc.) recommended by the ITU-R and a speaker system
for viewing movies as recommended by THX.
Note that to do so you must make 9.1-channel (or 9.2-
channel) speaker connections and set the speaker
output terminal setting to
Normal.
Setting the speaker system for high sound
quality multi-channel music sources (DVD
Audio discs and SACDs)
1 Switch the speaker system.
Select B ON. A is turned off and sound is only produced
from the surround B channel (speaker for listening to
music).
2 Switch the surround back channel.
Select SBch OFF. The above settings allow you to enjoy
high sound quality multi-channel music sources with the
speaker layout recommended by the ITU-R (5.1 or 5.2
channels).
About ITU-R BS.775-1
This configuration is recommended by the ITU-R
(International Telecommunication Union –
Radiocommunication Sector). It is the basic
configuration used in DVD Audio and SACD mixing
studios, though in some cases the sound is recorded
with the assumption that the surround speakers are at
the 135° position.
Setting the speaker system for movie
sources
Speaker configuration recommended by THX
Set the speakers with the surround back speakers
adjacent to each other and equidistant from the listening
position.
1 Switch the speaker system.
Select A ON. B is turned off and sound is only produced
from the surround A channel (dipole speaker).
2 Switch the surround back channel.
Select SBch ON. The above settings allow you to enjoy
movies with the speaker layout recommended by THX
(7.1 or 7.2 channels).
Bi-amping your speakers
Bi-amping is when you connect the high frequency driver
and low frequency driver of your speakers to different
amplifiers for better crossover performance. Your
speakers must be bi-ampable to do this (having separate
terminals for high and low) and the sound improvement
will depend on the kind of speakers you’re using.
• Connect your speakers as shown below.
This illustration below shows the connections for bi-
amping your front left speaker. Hook up your bi-amp
compatible speakers for other channels in the same way.
• Make sure that the + / – connections are properly
inserted.
Listening
position
60°
100°
to
120°
C
L R
(SL A) (SR A)
SL B SR B
(SBL) (SBR)
C L R
SL SR
Surround
Surround Back
SBL SBR
Surround
C
L R
SL A SR A
(SL B) (SR B)
SB L SB R
FRONT SUR-
ROUND-A SUR-
ROUND-B
L3 L2 L1
LOW
ND L
HIGH LOW
FRONT L
IN
High
Low
Bi-amp
compatible
speaker
SC_LX90_WY.book Page 62 Wednesday, February 6, 2008 11:49 AM