Primer
Crestron
Surround Sound
Bass Management
In a surround sound speaker system, the higher frequencies are
distributed to the speakers around the room: Left, Center, Right, Left
and Right Surround, and in a 7.1 system, Left and Right Rear Surround.
The lower, or Bass frequencies for all of these channels can be directed
through a Bass Management circuit, which outputs to a subwoofer.
Producing a consistent bass response from all the channels while
maintaining the integrity of the soundscape is impossible without bass
management. Bass management electronically imposes a bass
frequency crossover (typically 80 to 120 Hz) on some or all the
channels, and redirects the bass frequencies from each of the channels
to the subwoofer.
Large and Small
Each speaker in a surround system can be set for large or small. When
you select "Large" in a bass management function, it means all of that
channel's sounds, the entire range of frequencies, is directed to that
speaker. When "Small" is selected, the bass sounds (below the
crossover frequency) are filtered out of that speaker and directed to the
subwoofer. Physically small speakers may not be able to reproduce
very low frequencies without introducing distortion. Bass management
permits each speaker to operate in the range for which it was designed.
NOTE:
Bass management sends the bass content of small speakers to
the front speakers if they are large and there is no subwoofer.
Speaker Set-up Suggestions
The following are suggestions for setting up the bass management
feature of the surround system.
SPEAKER TYPE
SETTINGS
Front Floor-Standing Type With Built-In
Subwoofer And No Additional Subwoofer
Select front speakers as "Large"
Select Subwoofer as "Not Present"
Front Floor-Standing With Built-In Woofer
And An Additional Subwoofer
Select front speakers as "Large"
Select Subwoofer as "On"
Any Speaker System That Does Not Have
A Subwoofer In The System
Select front speakers as "Large" even if it the speakers are physically
small.
Select subwoofer as "Not Present."
Front Bookshelf Speaker With Small
Woofer or a Separate Powered Subwoofer
Select front as "Small."
Select Subwoofer as "On"
Front Bookshelf Speaker With 8" Woofer Or
Dual 6" Woofers
Set the front speakers as either "Small" or "Large".
Set the subwoofer as "On."
Center Speaker
Center channel speakers do not carry as much bass as a subwoofer or
main speakers, set the center speaker as "Small."
Surround Speakers
For bookshelf, on-wall or in-wall speakers as surrounds, select "Small."
For large floor-standing surround speakers, select "Large."
Subwoofer
Select subwoofer as "On."
The subwoofer reproduces the Low Frequency Effects bass channel along
with the bass of any other speakers that have been selected as "Small."
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Surround Sound
Primer – DOC. 6122
