Bryston SP3 Instrukcja Właściciela Pobierz pdf (Strona 35)

SP3 PREAMP / PROCESSOR

APPENDIX G SUBWOOFER SETUP

Sub-Woofer Setup Guide Pg. 1 of 2

SP3 Subwoofer & Speaker Setup

(Draft doc 7-Feb-2012, Bryston Ltd., Stan Bleszynski)

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 F

submenu,

separately for the front speakers, center, surround and back. The LFE channel cannot be altered or cut

off

and the cross-over frequency 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 socket.

2. Speaker Configuration.

Speaker configuration involves declaring the size such as Large

, Small or None (see 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).

Source Setup Screen

Volume level corrections (from -12 to +12dB) can be entered for each speaker individually in the

SPEAKR LEVEL screen.

Cross-over frequencies can be modified in CROSSOVER

and subwoofer

configuration is in SUBWOOFER submenu.

Subwoofer setup screen (Small speakers)

Except if subwoofer is declared as not present!

This is not normally enabled. The default Aux selection is Aux-L= down-mixed stereo Left, Aux-R=down-mixed stereo

Right (L

). To enable subwoofer through Aux-R, change SYSTEM SETUPMISCELLANEOUSAUX parameter.

A speaker is considered “Large” if it can reproduce bass down to 30Hz or lower. Anything else should be entered as

“Small”.

SPEAKR LEVEL correction values are normally entered during or after the “Pink Noise” test, which is or will be

described in a separate document. In most situations only the subwoofer level correction need to be applied specifically for

a given subwoofer efficiency and gain.

Cut-off frequency may need be changed only if the speakers are unusually small with higher bass cut-off than 80Hz, or if

they are medium size with lower than 80Hz cutoff but significantly higher than 30Hz (30Hz would be “Large”).

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