Sony STR-DE975 Operating Instructions Manual page 20

Multi Channel Surround Setup
x Front speaker size (FRONT)
Initial setting : LARGE
• If you connect large speakers that will effectively
reproduce bass frequencies, select "LARGE". Normally,
select "LARGE".
• If the sound is distorted, or you feel a lack of surround
effects when using multi channel surround sound,
select "SMALL" to activate the bass redirection circuitry
and output the front channel bass frequencies from the
sub woofer.
• When the front speaker is set to "SMALL", the center,
surround and surround back speakers are also
automatically set to "SMALL" (unless previously set to
"NO").
p Center speaker size (CENTER)
Initial setting : LARGE
• If you connect a large speaker that will effectively
reproduce bass frequencies, select "LARGE". Normally,
select "LARGE". However, if the front speakers are set
to "SMALL", you cannot set the center speaker to
"LARGE".
• If the sound is distorted, or you feel a lack of surround
effects when using multi channel surround sound,
select "SMALL" to activate the bass redirection circuitry
and output the center channel bass frequencies from the
front speakers (if set to "LARGE") or sub woofer. *
• If you do not connect the center speaker, select "NO".
The sound of the center channel will be output from the
2
front speakers.*
p Surround speaker size (SURROUND)
Initial setting : LARGE
• If you connect large speakers that will effectively
reproduce bass frequencies, select "LARGE". Normally,
select "LARGE". However, if the front speakers are set
to "SMALL", you cannot set the surround speakers to
"LARGE".
• If the sound is distorted, or you feel a lack of surround
effects when using multi channel surround sound,
select "SMALL" to activate the bass redirection circuitry
and output the surround channel bass frequencies from
the sub woofer or other "LARGE" speakers.
• If you do not connect surround speakers, select "NO".*
z
*1~*3 correspond to the following Dolby Pro Logic modes
1
* NORMAL
2
* PHANTOM
3
* 3 STEREO
20
x Surround back speaker size (SURR BACK)**
Initial setting : NO
This parameter can be set when the center speaker is set to
"NO" and the surround speakers are set to "LARGE" or
"SMALL".
• If you connect a large speaker that will effectively
reproduce bass frequencies, select "LARGE". Normally,
select "LARGE". However, if the front speakers are set
to "SMALL", you cannot set the surround back speaker
to "LARGE".
• If the sound is distorted, or you feel a lack of surround
effects when using multi channel surround sound,
select "SMALL" to activate the bass redirection circuitry
and output the center channel bass frequencies from the
front speakers (if set to "LARGE") or sub woofer.
However, if the surround speakers are set to "SMALL",
the surround back speaker is automatically set to
"SMALL".
• If you do not connect a surround back speaker, select
"NO".
** This parameter is not available when "Surround
speaker size (SURROUND)" is set to "NO".
z
About speaker sizes (LARGE and SMALL)
Internally, the LARGE and SMALL settings for each speaker
determine whether or not the internal sound processor will cut
1
the bass signal from that channel. When the bass is cut from a
channel the bass redirection circuitry sends the corresponding
bass frequencies to the sub woofer or other "LARGE" speaker.
However, since bass sounds have a certain amount of
directionality it best not to cut them, if possible. Therefore, even
when using small speakers, you can set them to "LARGE" if you
want to output the bass frequencies from that speaker. On the
other hand, if you are using a large speaker, but prefer not to
have bass frequencies output from that speaker, set it to
"SMALL".
If the overall sound level is lower than you prefer, set all speakers
to "LARGE". If there is not enough bass, you can use the
equalizer to boost the bass levels. To adjust the equalizer see page
38.
x Sub woofer selection (SUB WOOFER)
Initial setting : YES
• If you connect a sub woofer, select "YES".
3
• If you do not connect a sub woofer, select "NO". This
activates the bass redirection circuitry and outputs the
LFE signals from other speakers.
• In order to take full advantage of the Dolby Digital
bass redirection circuitry, we recommend setting the sub
woofer's cut off frequency as high as possible.