Boston Acoustics XB4 manual Connecting the Subwoofer to Digital Home Theater Systems

Connecting the Subwoofer to Digital Home Theater Systems

Digital 5.1, 6.1 and 7.1 home theater electronics dedicate one channel (the “.1”) to reproduce the special low-frequency (LFE) information (such as explosions and thunder) contained in digitally-encoded soundtracks.

Select ”subwoofer-yes“ from your receiver’s set-up menu. Connected this way, the receiver’s amplifier is relieved of having to reproduce the difficult low bass signals that can drive the receiver into audible distortion.

Use an RCA cable (not included), as shown, to connect your digital receiver’s subwoofer output to the subwoofer. Connect the other end to the XB4 jack labeled “bypass crossover control” underneath “line level in”.

XB4

Powered Subwoofer featuring BassTrac®

* use crossover control: removes high frequencies; use with sources lacking suitable filtering (most products without Dolby Digital or THX), or where manual control is desired.

**bypass crossover control: direct to woofer; use with sources having built-in crossover controls or bass management (most products with Dolby Digital or THX).

CAUTION: Disconnect supply cord before replacing fuse. For continued protection against risk of fire, replace only with same type fuse.

ATTENTION: Debrancher avant de remplacer le fusible. Utiliser un fusible de rechange de même type.

120V ~ 60Hz 1.25A

T 1.5A L 250V

		power		line level in
100	125			use	bypass
				crossover	crossover
		0	º	control *	control **
75	150	180 º
crossover	(Hz)	polarity
		speaker level in
	left			right

		CAUTION
		RISK OF ELECTRIC SHOCK
		DO NOT OPEN
C	US	AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

subwoofer out

back of receiver

If you do not wish to run RCA cables to your subwoofer, you may use speaker wire to connect the subwoofer in parallel with your main speakers (see diagram below). The subwoofer does not present any additional load to your receiver.

Select “subwoofer-no” from your receiver’s set-up menu. This sends the LFE signal to the main left and right speakers, and thus, to the subwoofer. Consult your receiver’s owner’s manual for more details.

When using the speaker wire hookup, the subwoofer’s built-in crossover is engaged. As a starting point, set the crossover control on the subwoofer about 10Hz higher than the lower limit of your main speakers’ bass response. Fine-tune the crossover setting by ear for the smoothest blend with your main speakers. The best setting of the crossover control will depend on speaker placement and personal preference.

XB4

Powered Subwoofer Featuring BassTrac®

* use crossover control: removes high frequencies; use with sources lacking suitable filtering (most products without Dolby Digital or THX), or where manual control is desired.

**bypass crossover control: direct to woofer; use with sources having built-in crossover controls or bass management (most products with Dolby Digital or THX).

CAUTION: Disconnect supply cord before replacing fuse. For continued protection against risk of fire, replace only with same type fuse.

ATTENTION: Debrancher avant de remplacer le fusible. Utiliser un fusible de rechange de même type.

120V ~ 60Hz 1.25A

T 1.5A L 250V

		power	line level in
100	125		use	bypass
			crossover	crossover
		0 º	control *	control **
75	150	180 º
crossover	(Hz)	polarity
		speaker level in
	left		right

		CAUTION
		RISK OF ELECTRIC SHOCK
		DO NOT OPEN
C	US	AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

		to main speakers
right		left
front
speakers
R	L	R	L	R	L
FRONT A		FRONT B		CENTER SURROUND

SPEAKER SYSTEMS

FRONT A OR B, CENTER, SURR, SURR BACK

:MINIMUM 6 OHMS FRONT A AND B : MINIMUM 8 OHMS

back of receiver

Be sure to connect + to + (red) and – to – (black).

5