Appendix G: Subwoofer Setup - Bryston SP3 Manual

APPENDIX G
1. Introduction.
Subwoofer output carries a combined (sum) contents of bass extracted from all the other
speaker channels, for those speakers that are declared as "Small", and also includes the
Low-Frequency Effect contents (LFE) present optionally only in the multi-channel
stream (labelled as 5.1, 6.1 or 7.1).
Bass contents is defined as the portion of the audio spectrum of frequencies from all the
channels that are below the cross-over frequency (default is 80Hz), added up to the LFE
channel (if present). The cross-over frequency can be modified in the SOURCE
SETUPCROSSOVER Fc submenu, separately for the front speakers, center, surround
and back. The LFE channel cannot be altered or cut off
setup or Xtra Bass setup does not affect it.
Bass contents carried through those channels where the speakers are declared as "Large"
is not re-routed through the Subwoofer. Instead it is output through those speakers
directly.
If Subwoofer is declared as not present, then the bass contents from all the channels will
be re-routed through the large speakers only (if there are any), otherwise it will be cut-
off.
SP3 provides a single subwoofer channel through back panel RCA socket paralleled with
an XLR socket. Optionally, it can also output the subwoofer channel through the Aux R
2
socket.
2. Speaker Configuration.
Speaker configuration involves declaring the size such as Large
SPEAKR SIZE menu) for the five categories of speakers: Front (Left and Right), Center,
Surround (side surround), Back (rear surround) and Subwoofer (in SUBWOOFER sub-
menu).
1
Except if subwoofer is declared as not present!
2
This is not normally enabled. The default Aux selection is Aux-L= down-mixed stereo Left, Aux-
R=down-mixed stereo Right (L
SETUPMISCELLANEOUSAUX parameter.
3
A speaker is considered "Large" if it can reproduce bass down to 30Hz or lower. Anything else should be
entered as "Small".
SP3 Subwoofer and Speaker Setup
21-June-2012, Bryston Ltd., Stan Bleszynski
Added footnote 6 on page 3.
,R ). To enable subwoofer through Aux-R, change SYSTEM
0 0
SubWoofer Setup
SP3 PREAMP / PROCESSOR
SUB-WOOFER SETUP
1
and the cross-over frequency
3
, Small or None (see
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